u/Ok_Kangaroo56

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LOG ENTRY: DAY 216

Day 216. I slept for four hours and woke up knowing something I had been trying not to know.

The name on the notepad is Dr. Élise Moreau. I have written about her work, what she built, what she lost, why she did it. What I have not written is the part where I am in this.

Eighteen months ago I received an email. The sender was Dr. Moreau, whom I knew the way you know people whose work you respect without ever having met them in person. She was polite and direct in the way that senior Sherbrooke faculty often are, which is to say more direct than Montréal and slightly more formal than Toronto. She said she had a paper near completion and wanted a technical review from someone with specific expertise in quantum shielding behaviour in deep-mine environments. She said she had read my DIDP preliminary reports and believed my perspective would be valuable. She said she would understand if I was too busy.

I was not too busy. I said yes.

I read the paper over a Saturday in November. Sarah was in the apartment, working at the kitchen table. I was in the spare room we used as a study, and at some point she knocked on the door and asked if I wanted tea, and I said yes without looking up, and she brought it and I did not drink it because I was reading.

The paper was called Directed Quantum Timeline Convergence: A Theoretical Framework for Boundary Collapse Induction. It described, with complete mathematical rigour, a mechanism for deliberately collapsing the quantum boundary between adjacent parallel timelines. It was framed as a thought experiment. The mathematics was impeccable. The predicted observational signatures were specific and falsifiable.

I read it twice.

I sat with it for a long time.

Then I wrote Dr. Moreau a three-page technical review. I noted two places where her boundary energy calculations could be tightened. I suggested a cleaner derivation for her resonance condition. I said the paper was elegant and the mathematics among the most careful I had seen in decoherence theory.

I did not write what I had actually been thinking for the previous six hours, which was: this is not a thought experiment. Someone built this. Or is going to.

I told myself I wasn't certain. I told myself theoretical frameworks get published all the time without anyone building them. I told myself it wasn't my field and I wasn't qualified to make that judgment. I told myself a lot of things, all of which were technically true and none of which were the actual reason I said nothing.

The actual reason was that saying something would have required me to act. To call someone, write someone, make a problem I could see on the horizon into a problem that was officially mine right now. And I was in the middle of a very important paper, and Sarah and I were in one of those quiet stretches that feel stable but aren't, and I had a rotation starting in four months.

It was easier to file it under probably fine and move on.

There is an episode of Scrubs where Dr. Cox tells a group of residents that the most dangerous person in a hospital is not the one who makes mistakes. Everyone makes mistakes. The most dangerous person is the one who sees something wrong and decides it is not their problem. J.D. takes it as a metaphor. Cox clarifies that he means it literally.

I found this very funny approximately thirty times.

It is less funny now.

I have been the most isolated, most shielded, most unreachable person on the planet for seven months. I told myself this was about the work. About proton decay measurements requiring the quietest place in the solar system. About career advancement and scientific contribution and the particular satisfaction of precision that nothing else in my life was offering at the time.

I came here because down here, two miles underground, surrounded by rock and heavy water and absolute silence, nothing can be my problem. No one can knock on the door of the spare room and ask if I want tea. No decisions arrive. No consequences land.

I came here to be unreachable.

The universe found me anyway.

The service hatch coherence pulse was degrading. I checked the readings and confirmed what I already knew: the localized field I had applied in Chapter 12 had held for about nine hours before Dr. Moreau's machinery started eating through it again. The boundary push at the hatch was back to 60% of its previous rate. Still faster than the uniform collapse everywhere else.

I needed to reapply the pulse.

Another application would cost me another 15% of the resonant excitation array's precision. I was already at 70% after the last one. Another reduction put me at 55%.

The plan required two generators firing in microsecond synchronization. At 55% precision, the timing window I could guarantee was roughly twice as wide as the plan's tolerance. Which meant the plan as designed would fail. I would excite the wrong resonant mode of the quantum field, compress my timeline to a point, and cease to exist instantaneously.

I applied the pulse anyway because the alternative was the hatch failing in four hours, which also resulted in ceasing to exist instantaneously. At least this way I had time to think of something better.

I tried Veritech Elliot again on the boundary carrier frequency. No response. I ran a more detailed analysis of the adjacent chamber's quantum signature, using all three remaining sensor arrays pointed in the same direction to compensate for the reduced resolution.

The stabilization pattern was not consistent with a timeline merger.

In a merger, the quantum signature of the absorbed timeline smooths out and disappears. This signature had not smoothed out. It had sharpened. Become more defined. More coherent. As if someone on the other side had deliberately reinforced their local quantum state, sealing themselves off from the incoming collapse and from me simultaneously.

Veritech Elliot had not been overwritten.

He had gone quiet on purpose.

I sat with that for a while and could not make it mean anything good.

I have been thinking about the deliberate superposition flash for several hours. I have talked myself out of it three times. I am about to do it anyway.

The previous flashes happened by accident. Momentary contact with the boundary creating an uncontrolled entanglement that swept my consciousness into the adjacent timeline without direction or duration. The Montréal kitchen. The smell of tourtière. Sarah not quite as happy as I wanted her to be.

What I am proposing is different. I want to use one of the three remaining LEGO sensor arrays as a sustained antenna, maintaining controlled contact with the boundary rather than a momentary one. If I modulate the contact frequency correctly I should be able to navigate the entanglement with some degree of intention, the way you can swim in a current rather than simply be carried by it.

The risks are not small. Sustained contact means sustained energy exchange with the boundary. The last accidental flash cost eleven centimetres of heavy water shielding. A sustained deliberate one could cost considerably more.

I am not looking for the Montréal kitchen this time.

Dr. Moreau's machinery is running somewhere on the surface. It is pushing specifically at my service hatch with a precision that suggests active targeting rather than passive pressure. Which means someone is monitoring it. Making adjustments. Present.

I want to find her in the superposition. Not to plead, not to negotiate. I am not sure I have any standing to negotiate with a woman whose daughter's life is on the other side of the wall I am trying to rebuild.

But I have read her paper. I know her mathematics better than almost anyone alive because she asked me to, and I did, and then I said nothing when I should have said something.

The tea went cold on the desk while I filed it under probably fine.

If anyone can find her in the quantum noise, it should be me.

I have configured the array. I have written the modulation parameters. I have a medical bag next to the console in case the re-entry is as bad as last time.

I am going to reach through the boundary deliberately and try to make contact with the person who caused all of this.

I am aware this could go badly. I am using badly as a technical term that includes but is not limited to instantaneous cessation of this specific version of my consciousness, which remains the only version I have.

There are worse ways to spend the time while the universe decides whether I get to keep existing.

I'm reaching out my hand.

Index - First Chapter - Previous Chapter

Want to see what was happening on the surface? Read the companion series here: Something Is Wrong With The World And I'm The Only One Who Notices. | Chapter 1: Hydrogen Lines

CHAPTER 12

LOG ENTRY: DAY 215 (12)

Her name is Dr. Élise Moreau.

She is fifty-three years old, a full professor of quantum decoherence physics at the Université de Sherbrooke, and the winner of the Gerhard Herzberg Canada Gold Medal for Science and Engineering, which is the highest honour the Canadian scientific community gives one of its own. I cited her boundary coherence paper fourteen times in my doctoral thesis. She cited my proton decay calibration work in three of hers. I have been reading her research for the better part of a decade without ever meeting her in person because the quantum physics world in Québec is collegial but not small enough that everyone knows everyone, just small enough that everyone knows of everyone.

Six years ago, her daughter was killed by a driver who ran a red light on rue King Ouest in Sherbrooke on a Thursday afternoon in November.

In an adjacent timeline, the light was green.

I found the rest of it in the Veritech dossier summary, which Veritech Elliot had pushed through the boundary carrier in a series of compressed data packets during the last three minutes of our connection before the signal died. The summary was dry and factual in the way government documents are dry and factual, which is to say it contained devastating information in the same tone you'd use to describe a parking violation.

Dr. Moreau had spent two years after her daughter's death working on conventional grief. Therapy, colleagues, time. Then she had spent the following two years building a theoretical framework for directed quantum timeline convergence, which is the precise scientific term for what the rest of us would call collapsing the multiverse on purpose to pull a specific alternate reality into existence. And then she had spent the final two years actually building it.

The Mandela Effect was the side effect. The bleed-through of infinite adjacent timelines pressing against each other as the boundaries thinned. The Berenstain Bears, Forrest Gump's grammar, the Monopoly Man's monocle, all the small wrongnesses people had been cataloguing on the internet for years. Not a psychological phenomenon. Not mass confabulation. The ambient noise of a physicist from Sherbrooke dismantling the walls between realities to get her daughter back.

I sat at the console for a long time after reading this.

There is an episode of Star Trek: The Next Generation called The Inner Light. Picard gets hit by a probe and lives an entire alternate life inside it, forty years as a man named Katan on a dying planet, a wife and children and grandchildren and a whole world that isn't his. Then the probe shuts off and he's back on the bridge of the Enterprise and it's been twenty-five minutes. He has to walk around for the rest of the series carrying forty years of a life that didn't happen and also his actual life, both of them equally real, neither one cancelling the other out.

I used to think the most unrealistic part of that episode was the probe. Turns out it was Picard functioning normally afterward.

I understood Dr. Moreau completely. That was the problem. I understood her in the specific, cellular way you understand someone whose situation is the photographic negative of your own. She had collapsed timelines for love. I was trying to preserve mine to stay alone in it. Both of us were using particle physics to avoid accepting something we couldn't fix.

My mother would have a word for that too. Several, probably.

The boundary telemetry pulled me back.

The targeted push at the service hatch had accelerated overnight. What had been an asymmetric deformation was now a pronounced indentation in the collapse sphere, aimed directly at the weakest structural point in my module like a thumb pressing into dough. The sensors were also showing something new in that section: the quantum coherence signature of the heavy water nearest the hatch was shifting.

Heavy water shields me because deuterium, the heavy hydrogen isotope that makes it D2O rather than H2O, interacts with quantum fields differently than regular hydrogen does. The nuclear spin properties of deuterium are what make the shielding work. If the boundary decoherence was affecting the heavy water directly, converting its quantum state toward whatever the new timeline's water chemistry looked like, the shielding wasn't just being worn away from outside. It was being dissolved from within.

I needed to counter it.

The decoherence array I had been building was designed for one specific purpose: the full resonant excitation firing, both generators, both sides, microsecond synchronization with Veritech Elliot. Using any part of it prematurely, redirecting power to stabilize the heavy water coherence in one localized section, would compromise the synchronization timing for the full plan. It was using a surgical tool to do a rough job. The tool would survive, technically. But it wouldn't be quite as sharp afterward.

I did it anyway. Because the alternative was watching the hatch fail in approximately four hours.

I rerouted 30 percent of the array's output into a localized coherence pulse aimed at the hatch-side section of the tank. The quantum coherence readings in that section stabilized within eight minutes. Not perfectly. Not permanently. But enough.

The full resonant excitation plan had just gotten approximately 30 percent harder to execute with the precision it required.

I wrote this down. I have been writing a lot of things down.

I tried to reach Veritech Elliot at 1340, using the boundary carrier method he had developed. I modulated the signal the way he had shown me and aimed it at the generator room's frequency band.

No response.

I tried again at 1355. And at 1410.

Silence.

I pulled up the sensor readings for the space adjacent to the porthole, the Veritech version of Sub-Level 6 that I had been able to see through the glass when the gantry lights were on. The quantum signature of that space had changed since my last reading.

The collapse boundary between our two spaces had stabilized.

Not collapsed. Stabilized. Settled into a fixed configuration rather than continuing to move.

I stared at this for a long time and tried to determine what it meant. There were two possibilities and the sensor data could not distinguish between them. The first was that Veritech Elliot had successfully stabilized his own bubble independently, anchoring his local timeline and creating a fixed boundary between his space and the general collapse. The second was that his timeline had fully merged with the new reality and he had been overwritten, and the boundary had stabilized because there was no longer anything on the other side pushing back.

One of those possibilities meant I had an ally I couldn't reach.

The other meant I was completely alone.

The sensor data looked the same either way.

I sat in the ventilation hum and the ozone smell and the particular quality of recycled air that you stop noticing after the first month and start noticing again when you're frightened, and I looked at the stabilized boundary reading on my monitor, and I thought about Picard walking around the Enterprise carrying forty years of a life he hadn't lived.

At least he had people to walk among.

Index - First Chapter - Previous Chapter

Author's Note: This is the continuation of the "The universe updated its software..." series! I updated the title to better fit the next phase of the story.

CHAPTER 11

LOG ENTRY: DAY 215

The CO2 scrubbers were at 79 percent efficiency and I could not put it off any longer.

For context: the DIDP life support system processes the air in my living module through a series of bio-filter canisters packed with lithium hydroxide granules and a secondary bacterial scrubbing membrane. The lithium hydroxide handles the bulk CO2 absorption. The membrane catches what the granules miss. Together they keep the air breathable for one human being for twelve months, assuming that human being performs routine maintenance on schedule.

I had not performed routine maintenance on schedule because I had been slightly preoccupied with the collapse of reality.

The bio-filter access panel is located behind the water recycler, which is located behind the equipment storage rack, which is located in the least accessible corner of the module specifically so that no one would be tempted to interfere with it unnecessarily. Whoever designed this layout had apparently never considered a scenario where accessing it urgently was required. I moved three crates of meal packs, a coil of spare fiber-optic cable, and a box of equipment I did not remember packing and did not have time to investigate.

The filter canisters, when I finally got to them, smelled the way I imagine a compost heap would smell if the compost heap had also been mildly fermenting for seven months underground. I am going to leave the specifics at that.

Replacing the lithium hydroxide granules was straightforward but took twenty minutes of careful work because the granules, if inhaled, are corrosive to lung tissue, which felt like the universe adding insult to the existing considerable injury. I wore a mask. I worked slowly. I filled three replacement canisters from the supply store, seated them in sequence, and moved on to the bacterial membrane.

The membrane was the problem.

It had degraded faster than the spec sheet suggested it would, which, as a physicist, I found professionally offensive. Specs exist for a reason. The membrane was rated for fourteen months of continuous operation. It had managed seven before turning into something that looked like a biology experiment that had gotten away from itself. To replace it properly I needed a specific type of microporous polymer sheeting from the supply locker.

I had used the last of it in month four to patch a coolant line.

I stood in the maintenance bay and looked at this situation.

The membrane needed to be replaced. The replacement material did not exist. The next best option was something with a similar porosity profile, flexible enough to seat correctly in the housing, and available in this module right now.

I looked across the room at the five grey LEGO sensor arrays floating in the heavy water tank.

The ABS plastic in LEGO bricks is not microporous polymer sheeting. But if I disassembled two of the arrays and used the flat plate elements to create a layered lattice structure, the gaps between the stacked plates would create a functional approximation of the membrane's filtration profile. Not as efficient. Not rated for anything. But better than breathing air that was slowly becoming less air and more something else.

I am sorry, Han. Again.

I pulled two of the five arrays out of the service hatch, disassembled them at the workbench, and spent forty minutes building a layered filter lattice out of components that had been, three months ago, part of the port engine nacelle of the most beautiful thing I had ever built. It worked. The scrubber efficiency climbed back to 91 percent within twenty minutes of reinstallation, which was not perfect but was firmly in the survivable range.

The cost was that I now had three boundary sensors instead of five. My telemetry resolution had just dropped by 40 percent.

I made a note of this. I made several notes. I have been making a lot of notes.

While I was doing all of this, I was also thinking about the name on the notepad.

I had pulled the academic archive from my hard drive an hour earlier, the offline repository of physics journals and conference proceedings I had downloaded before the rotation started. I ran a search on the name and read what came back while the lithium hydroxide granules were curing in their canisters.

I am not going to write the name in this log yet. I want to understand more before I do. But I can say this much: whoever this person is, they are not a fringe figure. They are not a conspiracy theorist or a rogue actor operating outside the bounds of the field. They are a published, peer-reviewed, deeply credentialed physicist who has been working in quantum decoherence research for longer than I have been alive.

They had cited two of my papers in their bibliography.

I had cited three of theirs.

We had been in conversation through our work for years without ever speaking directly. They had laid the theoretical groundwork for measuring quantum coherence in shielded environments. I had built on that groundwork to design the DIDP's primary sensor array. The lab I am sitting in right now, the lab that is the only reason I am still here to think about any of this, exists in part because of their research.

I sat with that for a while.

There is a moment in Scrubs, early in the series, where Turk tells J.D. that the hardest diagnosis is the one where the patient is lying to themselves about their own symptoms. He doesn't mean it as a metaphor. But J.D. takes it as one and spends the rest of the episode realizing he's been misreading his own situation the whole time, seeing what he expected to see rather than what was actually there.

I had been thinking about Veritech Elliot's phrase since the signal died. A mirror not a window. The superposition flash showing me what my brain constructs from desire and fear rather than what Timeline B actually looks like.

The problem was that I could not stop the phrase from spreading.

If my superposition flash was a mirror, then what else had I been holding up as a window?

I had told myself a story about the breakup with Sarah. The story went: I was the workaholic, she was the one who got tired, the ending was inevitable and neither of us was really the villain. Clean. Symmetrical. Comfortable enough to live inside for seven months without it getting worse.

But the mirror-not-window logic applied to memory the same way it applied to quantum flashes. Memory is reconstructive. It shows you what you need to see, weighted by what you're afraid to see.

My mother had a word for people who refused to be witnessed clearly.

She used it about my father once, quietly, when she thought I was asleep. She had not used it unkindly. Just accurately, the way she says most things.

I was thirty-four years old and two miles underground and I was starting to think she might have been talking about me.

I sealed the maintenance bay, replaced the equipment rack, and sat back down at the primary console.

Three sensor arrays instead of five. I pulled up the boundary telemetry and ran a fresh scan to see what the reduced resolution showed me.

The collapse boundary was still moving inward. That was expected. What was not expected was the shape of the movement.

Five sensors had given me a roughly spherical collapse pattern, uniform pressure from all directions. Three sensors gave me lower resolution, but it was enough to see that the sphere wasn't a sphere. It was slightly deformed. Asymmetric. One section of the boundary was pushing inward faster than the rest, the way a bruise spreads from a point of impact rather than evenly across skin.

I adjusted the sensor positions to get the best triangulation I could with what I had left.

The fastest-moving section of the boundary was on the side of the tank closest to the service hatch. The one I used to access the heavy water. The only point in the module's structure that was not fully reinforced.

I ran the geometry three times because I did not want it to be what it looked like.

It was what it looked like.

This was not uniform quantum pressure from infinite collapsing timelines. Uniform pressure would produce a uniform sphere. This was directional. Concentrated. Applied to the one weak point in my lab's architecture with a precision that random quantum decoherence does not produce.

Someone knew exactly where to push.

Index

Previous Chapter

First Chapter

CHAPTER 10

LOG ENTRY: DAY 215

"Hello," said my own voice through the headset.

Not the degraded, static-chewed version from the tether. Clear. Slightly flat on the vowels in the way that had been bothering me since our first conversation, the particular flatness of someone who grew up pronouncing French words with a suburban Laval cadence rather than the Plateau's slightly affected cosmopolitan clip.

"How are you on the surface channel?" I said. "The conduit was overwritten hours ago."

"It was," he said. "I've been thinking about that."

He had spent the ninety minutes since our tether signal died running calculations on the collapse boundary's electromagnetic properties. At the current stage of the timeline convergence, the boundary had thinned enough in certain frequency ranges that quantum-coherent microwave signals could propagate through it directly. Not cleanly. Not reliably. But enough. He had stripped the transceiver components out of two backup sensor units, built an improvised antenna array on the gantry railing in the generator room, and used the boundary itself as the carrier medium.

From my comm terminal's perspective, a signal propagating through the quantum boundary from an adjacent timeline and a signal coming down the mine shaft from the surface were indistinguishable. Both were external. Both registered the same way.

"You used the collapse boundary as a radio tower," I said.

"Yes." A brief pause. "I'm very pleased with it."

He said this with the particular satisfaction of someone who had solved an engineering problem under pressure and wanted that noted for the record. I recognized the tone because I had used it myself, usually right before something I had built stopped working.

"How long do we have?" I asked.

"Eight minutes before the carrier frequency shifts out of the coherent range. We should be efficient."

We compared whiteboards. It took about four minutes and confirmed what I had already suspected. He had arrived at the same resonant excitation solution I had, from the same N-to-infinity pressure model, through the same sequence of failed assumptions. Different handwriting, presumably. Same math underneath.

"Two generators," I said.

"Two arrays. Both sides. Microsecond synchronization."

"The timing is going to be brutal."

"I know. I've been working on the synchronization protocol." He said this the way McKay talks on Stargate Atlantis, which is to say with absolute confidence and the underlying implication that you should be grateful someone competent was handling it. "It's going to require both of us to hold position and not deviate from the firing sequence under any circumstances."

"What happens if one of us deviates?"

"We excite the wrong resonant mode of the quantum field and the collapse boundary inverts."

"Meaning?"

"Meaning instead of anchoring your timeline we compress it to a point and it ceases to exist instantaneously."

I thought about this for a second.

"No pressure," I said.

"Some pressure," he said.

A soft chime from my secondary monitor. CO2 scrubber efficiency at 87 percent, down from 94 at last check. The bio-filters were clogging. Not dangerous yet. A few hours before it became a real problem, on top of all the other problems. I noted it and looked back at the terminal.

"The name," I said. "The one you started to tell me before the tether died."

A beat.

"I can transmit it clearly now. Ready to write it down?"

"I've been ready since the signal cut out four hours ago."

He said the name.

Four syllables. I wrote them on my notepad. I had heard them correctly in the static, or close enough. The name sat on the paper and I looked at it for a moment and felt something shift in my chest that I didn't have a precise scientific term for.

It was not the name of a government agency. Not an organization. A person. Specific and individual, and I recognized it because anyone working in deep-mine quantum physics in Canada would recognize it. I am not writing it in this log yet. I do not understand the full implications and I am not committing accusations to the record until I do.

"You know who it is," Veritech Elliot said. Not a question.

"Everyone in this field knows who it is," I said. "That's what makes it insane."

"Veritech has a two-hundred page dossier. When I get the carrier stable enough I'll push the summary files through. It'll take time."

"Fine." I put the notepad face-down on the desk. "Tell me about your superposition flash."

A longer pause.

"Why?"

"Because mine happened roughly eighteen hours ago and it looked like a real estate advertisement for a life I don't have. I want to compare notes."

He was quiet for a moment. Deciding something.

"Same kitchen," he said finally. "Same apartment, I think. Same light through the window." He stopped. "She was sitting at the table. Not doing anything. Just sitting."

I waited.

"She had the same expression she had the night she left me."

I sat with that.

"Your Sarah left you too," I said.

"Eight months before my rotation started. Different reasons. Same result." Another pause. "But in the flash, she was still there. In the apartment. With the ring. She looked the way she looked on the last night, before the last conversation. Like someone waiting for something to be over."

The CO2 monitor chimed again. 84 percent.

"So Timeline B isn't what I thought it was," I said.

"I don't know what Timeline B is. That's exactly the point." He shifted, and I heard what sounded like a gantry railing creaking under his weight, 380 metres down a flooded tunnel in an adjacent universe. "What you saw in your flash and what I saw in mine should have been the same thing. We're the same person. Same quantum signature, same entanglement profile. We should be observing the same timeline state. But we saw different things."

He let that sit.

"Which means our flashes aren't showing us the actual state of Timeline B," I said slowly. "They're showing us something filtered through our own consciousness."

"Our own probability amplitudes," he said. "What your brain constructs as the most likely version of that timeline, given your specific fears and desires. Not a window into another reality. A mirror held up to this one."

The kitchen in Montréal. Tourtière with cloves. Sarah looking uncomplicated and happy and precisely like someone my subconscious had assembled from the pieces I missed most.

My mother's voice in my head, unbidden: Le monde a besoin d'un témoin, Elliot. The world needs a witness.

I had been so certain I was witnessing another timeline.

"I need to think about that," I said.

"I know," he said. "There's one more thing. About Timeline B. About Sarah, specifically, in the actual"

The carrier signal spiked. Two seconds of hard interference that stripped the voice completely. When the line cleared there was nothing. No static, no degradation. Just absence, where a voice had been.

I held the headset and listened to it.

The CO2 monitor chimed a third time. 81 percent and falling.

I put the headset down. Looked at my notepad. At the name sitting on it, face-down.

Then I turned it over and looked at it again, and thought about who in the world would want to do this deliberately, and what possible reason they could have.

And why that reason frightened me considerably more than the walls closing in.

First Chapter

Previous Chapter

CHAPTER 9

LOG ENTRY: DAY 215

The decoherence array design was not a complicated idea. Like most ideas that seem simple at first, it was waiting patiently to show me exactly how complicated it actually was.

The concept: take the DIDP's photomultiplier tube array, reverse the polarity on the cathode banks, and pulse quantum-entangled energy waves into the heavy water at three specific frequencies, each one tuned to the quantum signature of one incoming timeline. Three timelines, three frequencies, three emission banks. Push all three back simultaneously. Clean on the whiteboard. Problem solved.

I spent two hours on the power distribution calculations.

The numbers kept not working.

Not dramatically. In the quiet, irritating way where everything looks correct until you reach the last line and there is a residual term sitting there that should reduce to zero and doesn't. I went back through the algebra twice. Checked my unit conversions. Rechecked the fine-structure values from the sensor logs. The residual term sat there, patient and unhelpful, refusing to vanish.

I stared at it for a long time.

Then I did what I do when an equation won't close: I stopped trying to fix the answer and started asking what the equation was actually telling me.

The residual term had a structure. It wasn't noise. It wasn't a rounding artifact. It was a sum, and when I expanded it carefully, term by term, it was a sum over every quantum branch that wasn't one of my three measured timelines. The contribution of each individual branch was microscopic. But there were a lot of branches.

I wrote out the full expansion on the whiteboard. Kept adding terms. Kept watching the sum grow.

There is an episode of Stargate SG-1, season three, where Carter explains the quantum mirror to the rest of the team. She says parallel realities branch at every quantum decision point. Every collapsed wave function, every particle interaction, every moment where the universe had to pick an outcome, it picked all of them simultaneously in different branches. Daniel asks how many realities that means and Carter says the math suggests infinite.

I had been thinking about this problem like Daniel Jackson. Three mirrors, three alternate realities, a manageable discrete problem with a finite solution.

The residual term was Carter tapping me on the shoulder.

Elliot. It's not three mirrors.

I put the marker down.

The pressure on my bubble wasn't coming from three timelines. It was coming from all of them. The entire quantum multiverse pressing in simultaneously, each branch contributing a push that scaled with how similar that branch was to mine. Close timelines, with fine-structure constants nearly identical to my original, pushed hardest. Distant branches, where physics had diverged enough to produce a genuinely different universe, barely registered. The contribution dropped off sharply the further a branch sat from my original quantum signature.

Add all of those pushes together across infinite branches and you don't get chaos. You get a bell curve. A smooth, predictable distribution, peaked somewhere near my original timeline's fine-structure constant, tapering off in both directions. The universe wasn't a mob. It was a crowd with a center of gravity.

Here was the good news buried in that picture. As you add more and more timelines to the distribution, the bell curve actually gets narrower, not wider. The individual contributions average out. At true infinity, the noise from all those other branches becomes so coherent, so mutually cancelling, that the target I needed to hit, my specific original alpha value, sat at a precise and measurable offset from the peak. Cleaner than three timelines. Cleaner than a hundred. Mathematically, the more timelines pressing in, the easier it was to know exactly where to aim.

The bad news was the force required to actually move the needle.

The power you need to shift the local vacuum expectation value back toward your original quantum signature grows with the scale of the distribution you're fighting. Not linearly. It scales with the square root of the number of timelines contributing pressure. Three timelines: manageable. A thousand: difficult. Infinite: the power requirement also reaches infinity.

One generator couldn't do it. Not even close. The power requirement was so far beyond what a single geothermal turbine could produce that expressing the deficit in megawatts felt almost quaint. I needed something fundamentally different. Not more power from one source. A different geometry entirely.

I thought about Veritech Elliot's generator. Sitting 380 metres down the flooded tunnel in the adjacent chamber. Same specs. Same output. Both of us firing simultaneously from opposite sides of the collapse boundary.

Two sources. Opposing sides. Same frequency.

Not additive. Resonant.

If we tuned both arrays to my original alpha frequency and fired simultaneously, we wouldn't be pushing against the vacuum distribution from one direction. We'd be exciting a standing resonant mode of the local quantum field itself. Think of it like pushing a child on a swing. One person pushing from one side has to overcome all the inertia alone. Two people pushing from opposite sides in perfect rhythm put the same total force in but use the swing's natural motion to amplify the effect. The power required to shift the vacuum expectation value drops dramatically when you're working with the field's resonant frequency rather than fighting it broadside.

The timing tolerance was brutal. Microsecond precision across a 380-metre tether with degraded signal integrity, between two men who were technically the same person and had already demonstrated they couldn't go five minutes without disagreeing about something.

But it was physically possible.

Which was more than I could say about the previous plan.

I wrote the new approach on the whiteboard in large letters and underlined it twice.

Then the acrylic wall made a sound.

Not the deep groan from before. Something quieter. A dry tick, like a fingernail tapped against glass from the other side. I turned around.

The epoxy repair was failing.

The marine epoxy I had packed into the stop holes and spread across the fracture had been sitting in a thermal gradient for the better part of a day, expanding and contracting as the outer surface temperature fluctuated with the reality boundary's heat flux. It had started to delaminate. A thin line of white was reappearing along the original fracture, and at the lowest stop hole a bead of heavy water the size of a shirt button was forming on the inner surface.

I watched it for a second.

Then I went to get the drill.

The stop hole had widened slightly as the epoxy shrank away from the edges, which meant the stress concentration had returned, which meant the crack was live again and propagating at the microscopic level. I needed new stop holes further along the fracture's leading edges, ahead of where it had grown, before the pressure differential decided to do the job for me in a much less controlled fashion.

I pressed the bit against the wall and squeezed the trigger and tried not to think about how every second I spent doing this I was not finishing the array calculations.

Twelve minutes. Two new stop holes, fresh epoxy, a square of fibreglass mesh tape pressed over the entire repair for good measure. I stood back and looked at it. It held.

For now.

I went back to the whiteboard. To the new plan. To the timing calculations for a two-generator resonant excitation of the local quantum vacuum. To the fundamental problem of Veritech Elliot, 380 metres away down a flooded tunnel, on a comm line that had been dead since 0347.

I sat at the console and looked at the tether signal indicator. SIGNAL LOST. I had tried three times to re-establish the connection. Nothing back each time.

I was about to try a fourth when the comm terminal chimed.

Not the tether channel. Not the local-band emergency protocol Veritech Elliot had used before the boundary interference killed the signal.

The surface channel.

The one that had been dead since the reality overwrite ate the main power conduit six hours ago.

I stared at it.

The surface channel requires a physical connection. The copper conduit running up through two miles of mine shaft had been overwritten out of existence by a timeline where this section of the mine was abandoned decades ago. There was nothing to carry a signal on. There was, physically and literally, no wire.

The terminal chimed again.

Someone was calling from the surface. Through infrastructure that no longer existed. In a timeline where my lab was not supposed to be here.

I picked up the headset.

Previous Chapter

First Chapter

CHAPTER 8

LOG ENTRY: DAY 215

The line went dead at 0347.

I sat with the headset in my hand and listened to the static for about thirty seconds before putting it down. The comm terminal read SIGNAL LOST. The tether indicator showed the fiber-optic cable was still physically intact, running all the way down through the flooded service tunnel to the Veritech generator room and back. The cable was fine. The signal was gone. The reality boundary had pushed close enough to degrade the quantum-coherent carrier wave, which was a very precise scientific way of saying the universe had hung up on me.

Four syllables. That was all I had caught before the static swallowed it.

I wrote them down phonetically on my notepad, the way I thought I had heard them through the interference. I stared at what I had written. Then I crossed it out and wrote it differently, because I wasn't sure about the second syllable. Then I crossed that out too.

A name. Someone's name, presumably. The person or organization or whatever-it-was that had deliberately destabilized the quantum foundations of reality and caused the Mandela Effect to cascade across every timeline simultaneously.

Four syllables and a lot of static.

I put the notepad down.

Here is the thing about talking to yourself for forty minutes at the bottom of a mine shaft in the middle of an existential crisis: it doesn't actually help. You would think it would. You would think another version of yourself would have useful perspectives, emotional insights drawn from a slightly different life. And Veritech Elliot had been useful, technically. The standing wave problem, the third option, the anchored quantum signature approach. Good science. Necessary science.

But he had also grown up in Laval, which meant he had the same stubbornness as me with none of the Plateau-Mont-Royal charm. Listening to yourself argue with yourself about quantum array design at four in the morning, when your house is being eaten by a physics catastrophe, is deeply demoralizing in a way I had not anticipated.

I needed to do something with my hands that wasn't physics.

I went to the rec shelf and grabbed the Millennium Falcon instruction manual, because I had been meaning to use it as scratch paper and it was closer than any of my lab notebooks.

I picked it up. It was heavier than it should have been.

A photograph slid out from between pages forty-seven and forty-eight, the spread showing the cockpit assembly, and landed face-up on the floor.

I stood there looking at it for a moment.

I had forgotten I put it there. I had also, clearly, put it there on purpose.

Her name was Sarah Leroux. She was from Québec City, which she held over me with the serene superiority unique to someone from the actual capital, and she had a laugh that started quiet and then built unexpectedly, like a song you didn't realize was your favourite until the chorus hit. We met in third year of our respective PhDs at Université de Montréal. She was astrophysics. I was quantum metrology. We argued for forty-five minutes at a departmental mixer about whether the measurement problem was philosophically interesting or just a notational inconvenience before we noticed we were the last two people in the room.

We walked home along rue Rachel in the October dark, our breath misting in the cold, past the lights of the restaurants and the depanneurs still open at midnight. She was wearing a red coat she would later lose on the metro and mourn for three weeks. I remember thinking the city looked different with someone next to you. Less like a backdrop and more like a place.

We were together for four years.

They were, on balance, the best four years of my life. Which is the kind of thing you only fully understand from inside a pressurized tin can two miles underground, and I recognize the comic timing on that realization is not great.

The erosion wasn't dramatic. No single catastrophic moment, no screaming fight, no clear villain. Just a long, slow pattern of me choosing the lab. I am going to describe it plainly because I have had seven months underground to stop lying to myself about it.

Her thesis defence. I missed the reception because I was running a calibration sequence I could have rescheduled and didn't. She said she understood. I told myself she meant it.

Portugal was different, and I remember it differently than the rest.

We had booked the trip eight months in advance. A week in Lisbon in late June, our first real holiday in two years. I cancelled four days before because a submission deadline had moved and I convinced myself the timing was unavoidable. She went alone. She sent photographs every day: azulejo tiles on a church wall, afternoon light on the Tagus, a glass of wine on a terrace at dusk. In every one she was slightly off-centre, the composition you get when you ask a stranger to take your picture. I looked at those photographs between data runs and understood exactly what I was seeing. Then I went back to work anyway.

Her mother's birthday dinner in Québec City. I drove up late, left early, spent most of the meal checking my phone under the table. Three hours of highway dark on the drive home and the radio on low. I told myself the silence between us was comfortable.

I was a physicist, not a psychologist. I was very good at convincing myself the data supported the hypothesis I already wanted.

The last night was a Tuesday in November. The particular Montréal cold that doesn't just chill you but gets into the argument. She was at the kitchen table when I got home at eleven-thirty, a cup of tea gone cold in front of her, not reading, not watching anything. Just sitting in the kitchen light. When I came in she looked at me with an expression I hadn't seen before.

Not angry. Tired.

"Je suis fatiguée d'être seule avec quelqu'un," she said.

Tired of being alone with someone. Not alone. With someone.

I stood in my coat in the doorway and ran through responses the way I run through equations, eliminating the ones that didn't hold. I could apologize. I could promise different. I could explain that the paper was almost finished, that the next rotation would be shorter, that things would change.

I said none of them. The honest answer, the one living under all the others, was that I didn't know if I could be different. And I respected her too much to say otherwise.

She moved out that weekend. I helped carry boxes, which was somehow the worst part. The mundane logistics of it. Her coffee mug, her stellar formation textbooks, the small cactus on the windowsill she kept because she said it was the only living thing that could survive my apartment.

My mother called when she heard. Her exact words, delivered in the tone she reserves for my most spectacular failures: "T'as laissé partir quelqu'un de bien pour des particules, Elliot." Then she hung up.

She wasn't wrong. She never is, which I find deeply inconvenient.

I stood in the lab with the photograph and looked at it for the first time in seven months.

Parc de la Vérendrye, the summer before everything came apart. Sarah laughing at something off-camera, squinting against the light. Me looking at her instead of the lens. You could tell even in the photograph that I hadn't noticed anyone watching.

I put it back between pages forty-seven and forty-eight. Closed the manual. Put it back on the shelf.

Then I went to the console to get back to saving my timeline, which remained the one thing I was unambiguously good at.

The telemetry was running normally. Fine-structure constant oscillating between its three measured values. Collapse boundary holding at 1.4 metres from the tank edge. Everything exactly as terrible as before, no better and no worse.

I picked up my cold coffee.

And for less than a second, not long enough to log, barely long enough to register, the air changed. A warmth with no source. Dark roast espresso and the faint sweet smell of tourtière pastry just out of the oven.

Then cold recycled air and ozone. Same as always.

I stared at the empty lab.

The quantum sensors hadn't spiked. I hadn't touched the boundary. There was no physical mechanism for a superposition flash without direct contact.

Which meant either my brain was staging a protest, or Timeline B was done waiting for an invitation.

I looked back at the notepad. At the four syllables I had written, crossed out, and rewritten twice in the dark.

Somewhere out there, someone had done this on purpose.

And I still didn't know their name.

Chapter 9

CHAPTER 1

LOG ENTRY: DAY 214

Some context, because context matters here.

I am six thousand, eight hundred feet underground. That number sounds less impressive than it is until you do what I do every morning, which is stand at the pressure window of my living module and stare into the heavy water tank and think about how much rock is above me. Two kilometers of Precambrian Canadian Shield, nickel-laced and ancient, sitting on my head like a geological opinion. On the surface, directly overhead, there is a Tim Hortons. I know this because when I signed the rotation contract, I asked my supervisor what was above the site and she said, without pausing, a Tim Hortons and a drainage ditch. I am not sure why I found this comforting, but I did.

The lab is called the Deep-Ice Decoherence Project. DIDP. My supervisor pronounces it "did-p" which I find unprofessional but have never said out loud. I live and work in a pressurized cylinder roughly the size of a generous mobile home, sitting at the centre of an acrylic vessel containing ten thousand tons of ultra-pure heavy water. The heavy water is the point. It shields my sensors from cosmic background radiation so I can measure proton decay at a resolution that would make most physicists weep, and not in the good way. Month seven of a twelve-month solitary rotation. The original plan was that this would be good for my career.

The original plan was formed before my breakup with Sarah, so the career justification was also, let's say, doing some extra work.

Every morning at 0600 the comm terminal connects to the surface through a fiber-optic cable and pulls down a compressed text packet. News, weather, Wikipedia updates. Takes about four minutes and sounds like a dial-up modem trying to recite a grocery list. I hate it every single time. This morning I was watching Forrest Gump while it downloaded because I have seen Forrest Gump approximately thirty times and it requires exactly zero percent of my attention, which is what I have available at 0600.

The bench scene. You know the one.

Tom Hanks, box of chocolates, the nurse with the sensible shoes.

"My mama always said, life is like a box of chocolates. You never know what you're gonna get."

I paused it. I wanted to look up what year it won Best Picture because I couldn't remember and it was bothering me the way things bother you when you've been underground for seven months and your brain has started eating itself for stimulation. I spun my chair to the work terminal and opened the freshly downloaded data packet and queried the Wikipedia scrape.

Under the Legacy section, the article read: The film is famous for its iconic quote, "Life was like a box of chocolates."

Was.

I stared at this. I assumed vandalism. Some kid on the surface had gotten into the Wikipedia article right before my scraper ran, changed one verb, felt satisfied, moved on. This happens. The internet is enormous and much of it is bored.

But I checked the IMDb scrape. Same thing. Life was like a box of chocolates. I checked three archived Reddit threads from the pop culture dump. People arguing about it. Half of them insisting they remembered "is," the other half explaining patiently that it had always been "was" and the "is" crowd were simply misremembering. Someone had given this phenomenon a name. The Mandela Effect. Large groups of people sharing the same false memory, named after the widespread belief that Nelson Mandela had died in prison in the 1980s when he had in fact lived until 2013.

I rolled my eyes. Mass confabulation. The human brain is a famously unreliable hard drive. I had a paper on this somewhere.

But I was also bored, and this was the most interesting thing that had happened since I accidentally watched six consecutive episodes of That '70s Show and lost an entire Tuesday. So I decided to check. Properly.

I wrote a Python script to isolate the exact audio clip from both files. My offline copy of the movie, air-gapped, sitting in a hard drive that had not communicated with anything for two hundred and fourteen days. The surface packet version. If Tom Hanks had just swallowed an "s" and people were mishearing it, the acoustic waveforms would match. Same input, same output.

I ran a Fast Fourier Transform on both clips.

The graphs were not the same.

A short "i" sound and a "w" sound have completely different acoustic signatures. The phoneme structure of "is" produces a spike in the 2000 to 3000 Hz range. "Was" has a low-frequency profile, heavier below 500 Hz. My offline copy showed the spike. The surface file showed the low-frequency profile. These were not two recordings of the same word pronounced slightly differently. They were two different words.

I pushed back from the terminal.

Okay. So someone had gone to the considerable effort of digitally re-editing every copy of a thirty-year-old movie, altering every subtitle file, updating every text reference across the entire internet, all to change one verb in one sentence. The physical DVD copies sitting in people's homes had presumably also been updated. Retroactively. Without anyone noticing.

Or.

I swiveled to the primary console. DIDP runs continuous monitoring on the fine-structure constant. Alpha. The dimensionless number governing electromagnetic interaction between elementary particles, the bedrock of basically all physics. It should read 1/137.035999. It had read 1/137.035999 every single day for two hundred and fourteen days.

It read 1/137.035998.

I looked at that number for a long time.

The fine-structure constant does not change. It is not the sort of thing that wakes up on a Tuesday and decides to be slightly different. It is woven into the structure of matter itself. If it changes, everything changes, including the specific electrochemical cascades in a screenwriter's brain that produce language, which means in a universe with a slightly different fine-structure constant, that screenwriter sits down in 1994 and types "was" instead of "is" because that is simply the word his slightly different neurons produce.

My offline hard drive had been down here for two hundred and fourteen days. No network connection, no surface contact, nothing. A perfect snapshot of the universe as it was on the day I carried it underground.

The universe had updated. My hard drive hadn't. I hadn't.

Because of the heavy water and the Two kilometers of rock, I was sitting inside a quantum-shielded bubble that the reality update wave couldn't penetrate. Every human being on the surface had been quietly rewritten. I had not.

A red warning light came on.

WARNING: VESSEL PRESSURE ANOMALY.

The outer edges of the heavy water tank were showing thermal fluctuations. The new timeline was pressing against the old one and the friction was boiling the shielding. My sensors told me the reality boundary was eating through at roughly 4.2 centimetres per hour.

I did the math. Ninety-four hours before it reached the pressurized cylinder I lived in. Ninety-four hours before whatever version of me belonged to the new timeline replaced this one.

I looked at my empty mug. I had been drinking the same brand of instant coffee for seven months. It tasted like someone had described coffee to a chemist who had never smelled coffee. I had genuinely never enjoyed a single cup.

I went and made another one anyway, because it was that or start screaming, and the ventilation system in here was not rated for screaming.

Tabarnak...

Previous Chapter

CHAPTER 7

LOG ENTRY: DAY 215

The signal blinked at me for forty-three seconds before I answered it.

I know it was forty-three seconds because I counted. It gave me something to do other than think about the fact that I was about to have a phone call with myself.

I hit the receive key.

Static. Then a voice.

It was mine. Almost. Same baseline timbre, same slightly nasal quality I had always hated in recordings. But the cadence was fractionally different a hair slower on the delivery, vowels landing with a flatness that wasn't quite mine. The kind of difference you'd only notice if you'd spent thirty-four years living inside the original.

"You got my signal," the voice said. Not a question.

"Obviously," I said. "I answered it."

A pause. "You sound exactly like me."

"You sound almost exactly like me," I said. "Your vowels are flatter. Where did you grow up?"

"Laval," he said. A beat. "You?"

"Plateau-Mont-Royal." I pulled up a secondary window and started logging the conversation automatically. Pure scientific reflex. "So we're not identical. Different postal codes, at minimum."

"Tabarnak," he said quietly.

Which, I have to admit, felt reassuring.

His name was Dr. Elliot Vance lead researcher, Veritech Subsurface Systems Deep Quantum Initiative. His project was a corporate-funded equivalent of mine, privately contracted, running parallel research under a different name. In his timeline, federal funding for deep-mine quantum research had been privatized sometime in the late nineties. The heavy water, the proton decay measurements, the twelve-month solitary rotation all identical.

"Did you bring a hard drive?" I asked.

"Four terabytes."

"What's on it?"

A pause that felt uncomfortably familiar. "Stargate, mostly. Some Seinfeld. Every N64 game"

"ever made," I finished.

Silence on both ends of the line.

"That's deeply unsettling," he said.

"Add it to the list," I said.

We moved fast after that, the way you do when you're both scientists and both terrified and there isn't time to be polite. He walked me through his sensor readings. I cross-referenced them against mine. The three-timeline interference pattern sharpened on my monitor a tightening spiral of competing quantum states converging on the same point in the Canadian Shield.

"On my way to the generator," I said, pulling up the HUD log from the dive, "I passed a junction box with your company's name on it. About 210 metres into the service tunnel. Veritech Subsurface Systems."

"What condition was it in?"

"Phasing. Solid to the eye but my fine-structure sensor read an in-between value right at that location. Both timelines, simultaneously."

A longer pause. "There's a Creighton Mining panel at the same point on my side. I nearly touched it."

"Same rule?" I said.

"Do not touch it," we said simultaneously.

We both went quiet for a moment. Talking to yourself should feel more significant than this. In practice it mostly felt like a very efficient argument.

"Our decoherence arrays," he said. "What's your design?"

I told him. Three-frequency emitter banks, each tuned to repel one of the three measured timeline wavefronts. He listened without interrupting, which I appreciated because I do not usually listen without interrupting. When I finished he said: "I have the same design."

"Good. We coordinate the firing sequence. Both sides of the boundary simultaneously"

"That's the problem." His voice was careful. "I've been running the power calculations. If we both fire from opposite sides of the same boundary at the same frequencies, we don't push the timelines back."

I stopped typing.

"Standing wave," I said.

"Constructive interference," he confirmed. "Our signals amplify each other instead of cancelling the incoming wave. The boundary doesn't retreat. It"

"collapses inward. Faster than without us."

Silence. The ventilation system hummed. On my secondary monitor an amber warning light had been blinking for two minutes the acrylic wall epoxy showing new micro-stress fractures from the continued pressure differential. I had been ignoring it because I had larger problems. The universe was confirming this was the correct priority order.

"So we can't both fire," he said.

"One of us stands down," I said. "One lab survives. One doesn't."

The line was very quiet.

I understood exactly what I was saying. He understood exactly what I was saying. We were the same person, which meant we both grasped the full weight of it immediately and hated it in precisely the same way at precisely the same moment.

"There's a third option," he said finally.

"There is," I agreed. "But we'd need a completely different array design. Something that doesn't fight the individual timelines"

"but anchors to a single quantum signature and broadcasts it at sufficient amplitude to dominate the local vacuum expectation value," he finished.

"One signal," I said. "Impossibly precise."

"Brutally powerful," he said.

"We'd need to combine output. Both generators. Both arrays. Coordinated to the microsecond." I paused. "Which requires us to trust each other completely."

"Which is insane," he said, "because I know exactly how I think. And I do not trust myself."

Despite everything, I almost laughed. "Neither do I."

He was quiet for a moment. Then his voice shifted still mine, but careful now in a way I recognized. It was the voice I used when I had data I wasn't ready to say out loud yet.

"There's something else. About Timeline B. The happy one." He paused. "In my timeline, Veritech wasn't brought in just for the quantum research. They were contracted because the government flagged the Mandela Effect data as a physical anomaly. Not psychological. Physical. With a pattern."

The amber light blinked steadily on my monitor.

"What kind of pattern?" I asked.

"The kind with an origin point," he said. "A specific date. A specific location. The kind that doesn't emerge from natural quantum decoherence."

I stopped breathing for a second.

"Someone caused this deliberately," I said.

"Yes."

"You know who."

"We have a strong hypothesis," he said. "But Elliot"

The comm crackled. Hard. A burst of static sharp enough that I yanked the headset back. When it cleared the signal was thinner, clipping at the edges. On my telemetry the fine-structure oscillation had spiked, pushing the reality boundary three centimetres closer to the tank wall in under four seconds.

"Still there?" I said.

His voice came back fragmented. "boundary interference is degrading the tether signal. I don't know how long we"

"Who?" I said. "Who caused this?"

Static.

Then, just clear enough to catch: a name.

One name. Four syllables.

The line went dead.

Previous Chapter

CHAPTER 6

LOG ENTRY: DAY 215

I am a quantum metrologist. My entire career is built on the principle that when your data contradicts your model, you do not ignore the data. You rebuild the model, no matter how much the new model ruins your day.

The swim back was 380 metres of me rebuilding the model.

I moved fast, counting strokes, letting the math run in the back of my head the way it always does when I'm doing something physical and mindless. The other Elliot the grey drysuit, the fogged visor, the slow raised hand cycled through my thoughts on a loop.

Here was the problem.

The Elliot I had seen in my first quantum superposition flash the one from the invading timeline, the one I had been calling the enemy ever since was standing in a sunlit kitchen in Montreal. Flannel shirt. Wedding ring. Espresso. He was not underground. He had no reason to be underground. In his timeline, the DIDP project presumably either didn't exist or had been cancelled when the mine was contracted out to a company called Veritech, and he was up there being annoyingly happy while I was down here swimming through freezing water trying to save a universe that had sentenced me to a one-year solo rotation.

So who was in that generator room?

Not Timeline B Elliot. Timeline B Elliot was in Montreal.

Which meant the grey drysuit, the fogged visor, the raised hand that was someone from a completely different timeline. A third one. One I hadn't accounted for. One where Veritech ran the mine, but an Elliot still ended up underground, alone, on some version of the same project, for reasons I could only guess at.

I surfaced into the airlock at the 22-minute mark, hauled myself up the ladder, and stripped the helmet off before the outer door had finished cycling. I was already at the primary console before the drysuit hit the floor.

The power was back. Three megawatts of geothermal electricity humming through a cable I had personally dragged through a flooded tunnel. Every monitor blazed to life. The ventilation system roared. The CO₂ scrubbers kicked in with a sound like a deep, satisfied exhale.

I didn't celebrate. I pulled up the quantum field telemetry and started running new numbers.

Here is what I had assumed from the beginning: one timeline was collapsing into mine. One wavefront, moving inward from a single direction, compressing my heavy-water bubble like a slowly closing fist. Clean, manageable, terrifying but solvable. The math was the math.

Here is what the telemetry was actually showing, now that I had enough power to run the full sensor array at resolution:

The fine-structure constant wasn't settling to a single new value. It was oscillating. Flickering rapidly between at least three distinct numbers my original 1/137.035999, the surface packet's 1/137.035998, and a third value I hadn't seen before: 1/137.036001. Above my baseline. A timeline that had diverged in the opposite direction.

Three distinct values. Three distinct timelines. All collapsing simultaneously into the same point in space, which happened to be my lab.

I sat back in my chair and stared at the ceiling for a moment.

There is an episode of Stargate SG-1 season three, the one with the quantum mirror — where Daniel Jackson accidentally makes contact with an alternate reality and discovers that every time you look through the mirror, you're seeing a different universe. Carter explains that there are infinite parallel realities, all slightly different, all equally real. Jackson's response is to touch the mirror immediately and nearly get everyone killed, because Daniel Jackson has the self-preservation instincts of a golden retriever near a busy road. This made me laugh.

I had always thought the most unrealistic part of that episode was that nobody immediately started asking which reality had the best outcome for them personally.

Turns out the most unrealistic part is that they only ever had to deal with one alternate timeline at a time.

I wrote a new equation across my whiteboard. If N timelines are collapsing simultaneously into a single point, the total decoherence pressure on the shielded bubble isn't additive — it's multiplicative. Each wavefront reinforces the others. The math looked like this:

Ptotal=∑i=1NPi⋅∏j≠i(1+Δαjα0)P_{total} = \sum_{i=1}^{N} P_i \cdot \prod_{j \neq i} \left(1 + \frac{\Delta\alpha_j}{\alpha_0}\right)Ptotal​=i=1∑N​Pi​⋅j=i∏​(1+α0​Δαj​​)

Where each P_i is the individual pressure from timeline i, and the product term represents the interference amplification between wavefronts.

With two timelines, my original calculation gave me 94 hours before the bubble collapsed.

With three timelines, the interference amplification term blew up the math completely.

I ran it three times because I didn't want it to be right.

It was right every time.

I did not have 80 remaining hours. I did not have 60. I did not have 40. the number was 23 calisse...

I had 23 hours and change before the combined wavefront pressure of three collapsing timelines crushed my heavy-water bubble like an empty paper cup.

I put the whiteboard marker down very carefully on the desk. I picked up my mug of instant coffee, realized it was empty, and put it back down.

"Okay," I said to the empty lab. "Okay."

This was the moment in Scrubs where J.D. would have a long, quiet fantasy sequence to process his feelings. Maybe a musical number. Maybe a slow-motion montage of meaningful glances. I did not have time for a musical number. I had twenty-three hours to build a machine capable of simultaneously pushing back three distinct quantum wavefronts, each operating at a different fine-structure frequency, using equipment designed to detect proton decay and a LEGO collection that was currently 4,000 pieces short of a Millennium Falcon.

The decoherence array I had been planning was designed for one wavefront. To handle three, I needed to broadcast three distinct quantum frequencies simultaneously a harmonic triad, each one tuned to repel a specific timeline. Think of it like noise-cancelling headphones, except instead of cancelling ambient coffee shop noise, I was cancelling the fundamental electromagnetic constant of three competing universes.

I started sketching the modified array design. The photomultiplier tubes would need to be split into three independent banks, each pulsed at a different frequency. The power draw would be enormous probably everything the geothermal generator could give me, with nothing left over for non-essential systems. Heat, ventilation, lighting. All of it would have to run on bare minimum.

I had a plan. It was a bad plan in the way that all my plans were bad, meaning it was held together by physics, stubbornness, and the deeply Canadian refusal to admit defeat in adverse weather conditions.

I pulled up the engineering schematic and started typing.

That was when my communications terminal chimed. Of course I had customized the chime to sound like a Star Trek Communicator, what did you expect.

Not the surface channel. The surface channel was dead, overwritten, gone. This was a different protocol entirely a local-band emergency signal, the kind used for mine-to-mine communication within the same shaft network.

The source identifier read:

VERITECH SUBSURFACE SYSTEMS SUB-LEVEL 6 EMERGENCY TERMINAL.

The other Elliot had found the other end of my fiber-optic tether.

And he was calling me...

Previous Chapter

CHAPTER 5

LOG ENTRY: DAY 215 (5)

I have a rule about unknown corporate logos spray-painted on flooded junction boxes two miles underground in a mine shaft that is slowly being eaten by a quantum anomaly.

The rule is: do not touch them.

I hung motionless in the black water and studied it from a distance of roughly three metres. My helmet light held steady on the junction box. The logo was simple — a stylized geometric diamond above the letters VERITECH SUBSURFACE SYSTEMS in clean, sans-serif font. Very corporate. Very professional. Deeply, profoundly impossible.

I had the complete maintenance history of the Creighton Mine on my hard drive. Every contractor, every sub-contractor, every equipment supplier going back forty years. Veritech Subsurface Systems appeared in exactly none of them.

The quantum field sensor on my HUD was reading that in-between fine-structure constant right here, at this point in the tunnel. Not my timeline's number. Not the new timeline's number. The average of both, buzzing and unstable like a signal between stations.

The reality boundary had already pushed this far into the tunnel.

Which meant that junction box existed in both timelines simultaneously. In my timeline, it was a standard Creighton electrical conduit panel, totally unremarkable. In the new timeline, the mine had apparently been contracted to a company called Veritech that my universe had never invented.

The box was phasing. Flickering between two states at a quantum level. To my eyes it looked solid. To the universe, it was a coin spinning in the air, not yet landed.

I checked my HUD. Elapsed time: twenty-two minutes. Battery life remaining at the lab: ten hours, fifty-six minutes. Distance to Sub-Level 6 generator room: approximately 170 metres.

I thought about Captain Janeway. Specifically, I thought about every single time she flew the Voyager straight into the anomaly instead of around it because flying around it would take too long and the crew needed to get home.

She was right every single time, and it almost killed everyone every single time.

I swam past the junction box without touching it.

The last 170 metres were worse. The HUD registered three more bleed-through artifacts as I moved deeper into the tunnel — a section of wall where the nickel ore had been replaced by a different rock composition entirely, grey-green schist that had no geological business being in this part of the Canadian Shield. A length of pipe that was the wrong alloy — my glove tapped it accidentally and it rang with a flat, dull tone where the original steel would have pinged. Small things. Background details. The set dressing of an alternate universe leaking through the cracks.

I kept moving. I counted strokes. I did not think about the kitchen in Montreal.

At the 380-metre mark, the tunnel opened up.

The Sub-Level 6 generator room was enormous — a natural cavern the original mine operators had expanded and reinforced with concrete pillars and steel I-beams. It was also approximately 40% flooded, meaning I could stand on the equipment gantry if I could find it, which I could, because my helmet light caught the yellow-painted safety railing glinting just below the waterline about six metres ahead.

I hauled myself up onto the gantry, dripping, gasping, and deeply grateful to be vertical again.

The geothermal generator was there. Hulking and industrial, a Siemens SGT-100 turbine system the size of a city bus, sitting on an elevated concrete platform above the flood line. It was designed for exactly this situation — total surface power loss, mine sealed, emergency operations only. The maintenance panel was sealed with a standard hex-key lockout.

I had a hex key. It was on the utility ring clipped to my drysuit, right next to the flat-head screwdriver, the wire stripper, and a miniature Millennium Falcon keychain that I kept because I am who I am.

I cracked the panel. Inside was a sequence of manual start switches and a fuel status display. The geothermal loop — essentially a closed system that circulated water down to the hot rock layer and back up again as steam — showed nominal pressure. The system had been in standby for months, but standby was not dead.

I ran through the startup sequence from memory. I had read the emergency operations manual twice during month three, out of sheer boredom, on a night when even Seinfeld wasn't doing it for me. George Costanza's parking space disputes had lost their lustre somewhere around the four-month mark.

Switch one: fuel loop isolation valve — open. Switch two: pre-ignition thermal bypass — engaged. Switch three: turbine governor — set to manual. Switch four: primary ignition.

I held my breath and flipped it.

The turbine coughed. A deep, resonant vibration moved through the concrete under my boots, through the gantry railing, up through my gloves and into my teeth. The fuel loop hissed and gurgled as superheated steam hit the cold turbine housing.

For six horrible seconds, nothing happened.

Then the turbine caught.

The sound was immense — a rising whine that became a roar that became a steady, powerful thrum that I felt in my sternum. The generator output panel lit up green. Three megawatts of geothermal power, available for distribution.

"Yes," I shouted in French, which is not something I will be repeating in print.

I pulled the heavy-gauge power cable I had spool-carried in a pack on my back and jacked it into the emergency distribution port. This would carry three megawatts directly back through the tether channel to my lab. Enough power for the decoherence array. Enough power to push the reality boundary back. Enough power to save my timeline.

I allowed myself exactly four seconds of relief.

Then I hit the gantry lights.

The emergency fluorescents flickered on across the entire cavern — long, buzzing strips bolted to the ceiling, casting everything in flat white light. For the first time, I could see the full generator room, not just the cone my helmet lamp had been showing me.

The generator was exactly where it should be.

The gantry was exactly where it should be.

And on the far wall of the cavern, behind a section of equipment I had not been able to see in the dark, was a pressure window. A thick porthole of reinforced glass, standard in larger mine chambers, designed to observe the rock stress in adjacent cavities.

Through the porthole, I could see the adjacent chamber.

I recognized it immediately. Same dimensions, same concrete pillars, same I-beam reinforcement. It was the mirror image of the room I was standing in. In the new timeline, the Veritech version of Sub-Level 6.

The lights were already on in there.

And sitting at the Veritech version of the emergency equipment panel, still dripping from a swim through the same flooded tunnel I had just navigated, was a figure in a dark-grey drysuit with a helmet visor still fogged from the cold.

He was staring directly at the porthole.

Directly at me.

I could not see his face through the visor. But he raised one hand slowly in the universal gesture of someone who has just seen something they cannot explain.

I did not raise mine back. My hand was too busy holding the railing so I didn't fall.

There was another Elliot Vance in the alternate timeline.

And he had apparently had the exact same idea.

Previous Chapter

CHAPTER 4

LOG ENTRY: DAY 215 (4)

Here is a complete inventory of what I had available to survive a solo dive through a flooded, pitch-black mine shaft, two miles underground, with a reality-eating quantum anomaly slowly digesting the walls around me:

One commercial-grade neoprene drysuit, size Large, that had been folded in a yellow bin for seven months and smelled strongly of industrial rubber and existential regret. One twin-tank rebreather system, rated for six hours of breathable gas at depth. One high-lumen dive helmet with an integrated heads-up display that the manufacturer's brochure cheerfully called "mil-spec." One 100-metre spool of fiber-optic tether cable, which I would clip to my belt loop so the lab could theoretically pull my body out of the tunnel if I drowned.

That last part was in the official safety manual. Pull my body out. Very motivating literature.

I laid everything on my bunk and suited up with the calm, methodical efficiency of a man who has watched every episode of Star Trek: The Next Generation and knows that Enterprise crew members always die the moment they start panicking. I was not going to be the redshirt who trips over his own air hose. I was going to be Geordi La Forge: competent, methodical, annoyingly good at fixing things under impossible conditions while narrating the process out loud.

I pulled the drysuit over my flight suit and sealed the neck gasket. "Primary seal. Check." I clicked the rebreather harness across my chest. "Scrubber canisters full. Gas mix nominal." I seated the helmet, heard it lock with a satisfying clunk, and powered up the HUD. A pale blue grid flickered to life across the inside of the visor.

"Heads-up display. Check." I looked at myself in the darkened monitor screen. A bulky, neon-yellow submarine man stared back at me from the bottom of the Earth.

"You look absolutely ridiculous," I told my reflection.

My reflection agreed, silently.

Before I moved to the airlock, I ran one final calculation. The service tunnel to Sub-Level 6 was approximately 380 metres long. My rebreather would scrub CO₂ and recycle my exhaled breath, giving me a theoretical six hours of gas. The tunnel was flooded to an estimated 60% capacity based on the last maintenance survey, which was logged fourteen months ago. The depth of the water column at the lowest point was roughly four metres — enough to swim through, not enough to crush me. The water temperature was 4°C.

Hypothermia in a drysuit at 4°C, with minimal physical exertion: onset in approximately two hours, incapacitation in four.

Six hours of air. Four hours before I go stupid and start forgetting what I'm doing. 380 metres of flooded tunnel.

I needed to move fast and not stop to admire the scenery.

I clipped the fiber-optic tether to my belt and walked to the airlock. It was a narrow, cylindrical chamber just big enough for one suited person and a modest amount of personal shame. I stepped in and hit the interior seal button.

The heavy door thunked shut behind me.

I stood there in the dark of the airlock for a moment. Just me and the low hiss of my rebreather and the sound of my own heartbeat doing something dramatic in my ears.

I want to be very clear about something. I am a physicist. My job is to sit in a chair and think very hard at equipment. The most physically dangerous thing I had done in the past seven months was once trip over a power cable and spill lukewarm instant coffee on my keyboard. I was not a deep-sea diver. I was not a Navy SEAL. I was a thirty-four-year-old French-Canadian man with a PhD in quantum metrology, a 4-terabyte hard drive of 90s television, and a moderate coffee dependency.

But the generator was down there. And without it, everything died. The scrubbers, the sensors, the decoherence array I hadn't even built yet. The entire plan to save my timeline and the only version of myself who still remembered Forrest Gump's grammatical preferences.

I hit the exterior seal button.

The outer door opened with a damp, hydraulic sigh, and the service tunnel yawned in front of me.

The helmet light cut a sharp cone through the dark. The tunnel was roughly three metres wide, bored straight through the Canadian Shield by industrial drill heads that cared nothing for elegance. The walls were raw nickel ore, glittering dully in the lamplight, streaked with the pale rust of iron oxidation. The floor of the tunnel had disappeared somewhere around fifty metres in, replaced by black water that reflected my light back at me like a mirror.

I waded in.

The cold hit me immediately — not in my skin, the drysuit handled that — but in my bones. 4°C is not a temperature. It is a philosophical position. It is the universe informing you, with complete neutrality, that it does not require your continued participation.

I pushed forward anyway.

The water rose to my waist, then my chest. At the 80-metre mark, I had to tuck my chin and swim. My helmet light swept across the ceiling and walls in rhythmic arcs, illuminating iron support beams furred with orange rust, ancient electrical conduit in deteriorating plastic sheathing, the occasional blast-drill anchor bolt half-dissolved by decades of mineral water. The fiber-optic tether paid out smoothly behind me.

I counted strokes. It was something I remembered from a Malcolm in the Middle episode, funnily enough — Reese teaching Dewey to swim by having him count strokes to stay calm. I had laughed at that scene. It seemed less funny now.

At the 200-metre mark, I stopped to check the HUD readouts. Rebreather: nominal. Tether: 200 metres deployed. O₂ saturation: 98%. Elapsed time: eighteen minutes.

And then something on the HUD made my blood go very cold in a way that had nothing to do with the water temperature.

The quantum field sensor — a secondary instrument I had wired into the helmet at the last minute using components stripped from one of my LEGO sensor arrays — was displaying a reading I had only ever seen once before.

The fine-structure constant.

It was the wrong number. Not the number from my timeline, and not the number from the surface packet. It was something in between — a fractional average, like two radio stations bleeding into each other at the edge of their broadcast range.

The reality boundary wasn't just pressing against my lab from the outside.

It was already inside the tunnel.

I stopped swimming. I hung there in the black water, perfectly still, and moved my helmet slowly in a full arc. The light swept across the walls, the ceiling, the flooded floor ahead of me.

And on the door of a flooded junction box, bolted to the rock wall at the 210-metre mark — where I was about to swim — someone had spray-painted a corporate logo I did not recognize. A company that, according to every file on my 4-terabyte drive, did not exist. Had never existed.

In my timeline.

Chapter 5

CHAPTER 1

LOG ENTRY: DAY 214

I am a man of science. I deal in observable facts, quantifiable data, and rigorous peer review. I do not believe in ghosts, I do not believe in magic, and I certainly don't believe the universe cares enough about me to play practical jokes.

But right now, the universe is being a real dick.

To understand why, you need to understand where I am. I’m sitting in a pressurized tin can at the bottom of the Creighton Nickel Mine in Sudbury, Ontario. My laboratory—the Deep-Ice Decoherence Project, or DIDP—is exactly 6,800 feet below the surface of the Earth. I am surrounded by two miles of solid Canadian bedrock and an acrylic vessel containing 10,000 tons of ultra-pure heavy water.

My job is to measure the decay of protons to a degree of accuracy that would make Einstein weep. I am currently on month seven of a twelve-month solitary rotation. I sit here in total isolation for a year at a time, making sure that the fundamental building blocks of matter aren't quietly falling apart. The heavy water and the rock shield my sensors from all cosmic background radiation. It’s the quietest place in the solar system.

I am literally the most isolated human being on the planet.

It’s also the most boring.

To keep myself from going completely insane, I brought down a 4-terabyte, air-gapped hard drive. It contains the pinnacle of human achievement: an entire archive of 90s and 2000s pop culture. Every Nintendo 64 game, thousands of movies, and all nine seasons of Seinfeld. It is my lifeline. When you are hiding two miles underground to avoid dealing with a messy breakup and the general exhausting nature of other human beings, you need a distraction.

Every morning at 0600, my comms terminal connects to the surface via a mile-long fiber-optic cable. It downloads a compressed text packet of daily news and Wikipedia updates. It’s a one-way data dump just to keep me tethered to civilization. If you had told me a year ago that my greatest enemy two miles beneath the Canadian shield would be a dial-up modem sound, I would have asked to check your vitals.

Today, while the packet was downloading, I decided to fire up a classic. I booted up Forrest Gump. I’ve seen it maybe thirty times. It’s a masterpiece.

I was at the bench scene. You know the one. Tom Hanks is sitting there with his box of chocolates, talking to the nurse.

He looks at the camera and says, "My mama always said, life is like a box of chocolates. You never know what you're gonna get."

Classic. Iconic.

Except, I paused it right there because I couldn't remember what year it won Best Picture. I spun my chair around to my work terminal, opened the freshly downloaded surface data packet, and queried the Wikipedia scrape for the movie.

There, under the "Legacy" section, the article read:

>

I scoffed. Was. What an idiot. Some troll had vandalized the Wikipedia page right before the surface script scraped it for my daily download.

But I had nothing but time, so I dug deeper into the text packet. I checked the IMDb scrape. I checked the archived Reddit threads included in the pop-culture dump.

Every single reference said "was". Life was like a box of chocolates. People were debating it. Whole forums were dedicated to people claiming they remembered it being "is," while the "facts" proved it had always been "was." They were calling it the Mandela Effect.

I rolled my eyes. Mass confabulation. A bunch of people misremembering a vowel sound. The human brain is a notoriously terrible hard drive. We overwrite our own memories all the time based on suggestion.

But to prove them wrong—and to satisfy my own petty, burning need to be right—I decided to extract the audio file from my offline, air-gapped copy of the movie and compare it to a digital audio snippet included in the surface packet.

I wrote a quick Python script to isolate the exact 2.4 seconds of audio from both files. If it was just a pronunciation quirk—Hanks swallowing the "s" in "is" so it sounded like "was"—the acoustic waveforms would be mathematically identical.

I ran a Fast Fourier Transform to analyze the audio frequencies.

I stared at the two graphs on my monitor.

They didn't match.

It wasn't a subtle difference, either. The phonetic structure of a short 'i' sound versus a 'w' sound creates entirely different acoustic signatures. My offline file had a clear, distinct spike in the 2000-3000 Hz range—the 'i' in "is."

The surface file—the one representing the outside world—had a low-frequency rumble characteristic of a 'w'.

My heart did a weird flutter in my chest.

Okay, Elliot, I thought. Someone on the surface digitally altered the movie file. But why? Why would someone alter every digital copy of a 1994 movie, modify the subtitle sync files, and change every text reference on the internet, just to change one verb? And how did they alter the physical DVD copies people had in their homes?

I am a metrologist. When the data doesn't fit the model, you don't throw out the data. You test the baseline.

I swiveled to my primary console. The DIDP sensors are designed to measure the universe at the quantum level. They constantly monitor the fine-structure constant—the number that dictates the strength of electromagnetic interaction between elementary particles.

Usually, $\alpha$ is a dimensionless constant:

$$\alpha = \frac{e^2}{4\pi \varepsilon_0 \hbar c} \approx \frac{1}{137.035999}$$

I pulled up the live telemetry from the heavy water tank.

The number wasn't 1/137.035999.

It was 1/137.035998.

The fundamental electromagnetism of the universe had shifted by a fraction of a decimal point.

I froze. The humming of the lab’s ventilation system suddenly felt incredibly loud.

I looked at my air-gapped hard drive. It was sitting on my desk, totally disconnected from any network. It had been sitting there, two miles underground, surrounded by 10,000 tons of radiation-shielding heavy water, for 214 days.

I looked back at the surface data packet.

The universe didn't digitally alter a Tom Hanks movie. The universe changed.

Sometime in the last 24 hours, the timeline of reality was rewritten. A butterfly flapped its wings in 1950, or a quantum state collapsed differently at the dawn of time, and it rippled forward, changing the fine-structure constant and causing a screenwriter in 1994 to type the word "was" instead of "is."

The whole universe updated to the new software patch.

Except for my lab.

Because of the heavy water and the two miles of bedrock, I am sitting in a quantum-shielded Faraday cage. The reality-overwrite wave hit the Earth, but it couldn't penetrate the DIDP shielding.

I didn't misremember the quote. My hard drive is an artifact from a timeline that no longer exists. I am officially the last human alive who remembers the original timeline.

A red warning light flashed on my primary console.

WARNING: VESSEL PRESSURE ANOMALY.

I checked the sensor feeds. The outer edge of the heavy water tank was experiencing massive thermal fluctuations. He calculates that his heavy-water tank is protecting him, but it's boiling away at the edges. The new timeline—the one where Forrest Gump speaks in the past tense—is physically pressing against my reality bubble. The friction between the two collapsing timelines is boiling the heavy water on the outer edges.

The shielding is failing. The new reality is eating through my tank at a rate of roughly 4.2 centimeters per hour.

I did some quick mental math. Based on the radius of the tank, the reality overwrite will breach my pressurized living quarters in exactly 94 hours.

When it does, I will be overwritten. My memories of the original timeline will be erased, and the Elliot Vance who sits here will cease to exist, replaced by whatever version of me belongs to the new timeline.

I have four days to figure out how to stop a quantum reality collapse using nothing but particle physics, duct tape, and my Nintendo 64. And based on the escalating alerts on my metrology board, this reality bubble is going to pop in about four days.

My mother is from Quebec. She taught me that when the universe fundamentally breaks and you are facing imminent existential erasure, the only appropriate word to use is tabarnak.

Tabarnak.

LOG ENTRY: DAY 214 (2)

Okay, the initial panic attack has subsided. Mostly.

I spent the last twenty minutes hyperventilating into a brown paper bag, which was highly undignified but biochemically necessary. Now, I have a whiteboard marker in my hand, and I am going to science the shit out of this.

If I don’t get rescued by my own ingenuity, I’m dead anyway. Well, not dead. Just erased. Which, from my perspective, is functionally identical.

Let's break down the problem into small, logical steps.

Problem 1: A localized quantum decoherence wave is eating my house. Problem 2: I have no way to map the exact shape and speed of the collapse boundary. Problem 3: I am out of instant coffee.

I will tackle Problem 3 first, because it is the only one I am currently equipped to solve. I rip open a new bag of freeze-dried dirt crystals, dump a scoop into a mug of lukewarm water, and chug it.

Now, back to Problem 2.

To figure out how to stop this reality collapse, I need data. The metrology board tells me the fine-structure constant has changed, and thermal sensors tell me the outer edges of the 10,000-ton heavy water tank are boiling. But I need to know exactly where the boundary is right now.

I need to place localized quantum sensors at varying depths inside the heavy water tank.

The issue is that DIDP wasn't built for a reality-overwrite scenario. The sensors I have are meant to be mounted rigidly to the lab's exterior hull. They aren't meant to be floated freely in thousands of gallons of water. To get accurate depth readings, I need custom, watertight buoyancy housings that can hover at exact calculated depths.

And I can't exactly run to the hardware store.

I survey my living quarters. It’s a pressurized cylinder roughly the size of a spacious mobile home. It’s packed with monitors, life support gear, and my personal belongings.

My eyes land on a large, intricately constructed grey plastic ship sitting on my designated "recreation" desk.

The 7,541-piece Ultimate Collector's Millennium Falcon.

I let out a long, painful sigh. It took me three weeks to build that. I sorted the pieces meticulously. I watched all ten seasons of Stargate SG-1 while snapping those beautiful little bricks together.

But LEGO bricks are manufactured to a tolerance of 10 micrometers. They are made of ABS plastic, which doesn't react with heavy water. I can snap them together to create modular, perfectly calculated volume displacements. They are literally the best precision engineering material I have in this bunker.

"I’m sorry, Han," I whisper to a tiny plastic figurine.

I begin dismantling the Falcon. It hurts my soul. Every snap-crack of parting plastic feels like a personal failure, but I sort the plates and bricks into neat piles.

I need to create five sensor arrays. I calculate the required displacement. Heavy water ($D_2O$) has a density of $1.11 \text{ g/cm}^3$, which is about 11% denser than normal water. I run the math on a notepad:

$F_b = \rho \cdot V \cdot g$

To achieve neutral buoyancy at specific depths, I need the LEGO housings to displace exactly the right amount of heavy water to counteract the weight of the sensor and the plastic itself.

I spend the next four hours snapping bricks together, sealing the seams with a layer of waterproof resin from my suit repair kit. I embed a quantum sensor in the center of each grey, blocky sphere. They look less like high-tech metrology equipment and more like abstract, cubic Death Stars.

I carry the five arrays into the small airlock that connects my living module to the heavy water tank.

Normally, no one goes into the tank. It’s sealed. But there's a manual service hatch designed for robotic submersibles. I cycle the lock, crack the hatch, and the sharp smell of ozone hits me.

I carefully release the five LEGO-housed sensors into the dark, freezing water. They bob for a second, then slowly sink, settling at their perfectly calculated depths.

I seal the hatch and rush back to the main console.

Data begins streaming in.

I am officially mapping the edge of a reality collapse. The data confirms my worst fears. The boundary is a perfect sphere, slowly shrinking inward toward my lab.

But there’s a blip in the data stream. Sensor 3—the one suspended exactly three meters from the outer edge—is transmitting garbage.

I frown and tap the monitor. "Come on, little guy. Give me the Planck readings."

The screen flickers.

Suddenly, my vision swims. The dark metal walls of the DIDP lab dissolve into static. The low hum of the ventilation system vanishes, replaced by a jarring, terrifying sound:

Birds.

I am standing in a sunlit kitchen. The smell of fresh tourtière and brewing espresso hits me like a physical blow. I look down. I’m not wearing my DIDP lab jumpsuit. I’m wearing a blue flannel shirt.

And a silver wedding band on my left ring finger.

Previous Chapter

CHAPTER 2

LOG ENTRY: DAY 215

My first instinct as a highly trained, heavily credentialed physicist was to throw up.

I didn't quite make it to the bio-receptacle. I heaved a mixture of stomach acid and terrible instant coffee all over the grated metal floor of the control room.

I lay there for a minute, my cheek pressed against the cold aluminum grating, gasping for air that tasted like ozone and recycled copper. The sound of birds was gone. The smell of espresso and tourtière was gone. The warmth of a sunlit Montreal kitchen was completely obliterated by the low, mechanical thrum of the DIDP ventilation system.

I looked down at my left hand. No flannel shirt. Just the standard-issue blue Nomex flight suit. No silver wedding band. Just a pale, slightly shaky finger.

"Hypoxia," I wheezed, rolling onto my back. "Or carbon monoxide. Or a nitrogen leak."

I dragged myself up by the edge of the primary console, my legs feeling like they were made of damp sponge. When you hallucinate a completely different life where you aren't a lonely hermit hiding in a subterranean tin can, the logical conclusion is not "I traveled dimensions." The logical conclusion is "My life support is failing, and my dying brain is giving me a highlight reel of my greatest regrets."

I slammed my fist onto the environmental controls.

Oxygen: 20.9%. Carbon Dioxide: 0.04%. Nitrogen: 78%. Atmospheric pressure: 14.7 psi. Internal temperature: 18°C.

The air was perfect. I wasn't suffocating. I wasn't being poisoned. I was completely, metabolically healthy.

I wiped the spit off my chin with the back of my sleeve and swiveled my chair toward the telemetry terminal. The data stream from the five LEGO-housed sensors I had dropped into the heavy water tank was still scrolling down the screen.

I stared at the numbers from Sensor 3—the one floating exactly at the edge of the collapsing reality boundary. The exact one whose data feed I had touched right before I teleported to a kitchen that doesn't exist anymore.

The numbers were impossible, but they were right there.

There is a fundamental equation in quantum mechanics—the time-dependent Schrödinger equation. It describes how the quantum state of a physical system changes over time. It looks like this:

$$i\hbar\frac{\partial}{\partial t}\Psi(\mathbf{r},t) = \hat{H}\Psi(\mathbf{r},t)$$

The $\Psi$ (Psi) is the wave function. It represents the probability amplitude of the universe. It’s the math that says "reality is doing this right now." The $\hat{H}$ is the Hamiltonian operator, which represents the total energy of the system.

According to Sensor 3, the exact millisecond my finger touched the screen to lock the telemetry, the Hamiltonian of the incoming reality boundary spiked, and my local wave function... merged with it.

I didn't just hallucinate Sarah. The sensors confirmed a localized collapse of quantum superposition. Because I was actively observing the data of the invading timeline—the timeline where Forrest Gump speaks in the past tense, where Berenstain is spelled with an 'A', and where, apparently, I am not a miserable recluse—my consciousness temporarily entangled with the Elliot Vance of that timeline.

A "glitch in the matrix," delivered straight to my cerebral cortex via a plastic Han Solo.

"Okay," I muttered, my voice echoing in the empty lab. "Okay. That happened. That is a thing that happened."

I took a deep breath, trying to steady my racing heart. I needed to focus. If I didn't stop this, that reality was going to crush mine entirely. I would be erased. The Elliot in the flannel shirt would overwrite the Elliot in the Nomex suit.

Maybe that wouldn't be so bad. He seemed happy. He had Sarah. He had espresso that didn't taste like roasted dirt.

No, I told myself, slapping my cheeks with both hands to snap out of it. He's a mathematical anomaly caused by a cosmic software update. He didn't earn that kitchen. A shrill, piercing alarm shattered my internal monologue.

Red lights began strobing across the upper tier of the main console. I spun around to the heavy water tank telemetry.

WARNING: VESSEL PRESSURE CRITICAL.

"What?" I lunged for the keyboard. "How long was I out?"

I checked the internal chronometer. It had been forty-five minutes since I touched the screen. I had been unconscious—or mentally vacationing in Montreal—for three-quarters of an hour.

And in that time, the friction between the two collapsing realities had been working overtime.

The boundary of the new timeline was pressing inward against the 10,000 tons of ultra-pure heavy water ($D_2O$). Heavy water has a slightly higher boiling point than regular water—101.4°C. But the kinetic energy generated by two universes physically grinding against each other was dumping massive amounts of heat into the tank.

Fourier's Law of Heat Conduction dictates how heat transfers through a material:

$$\mathbf{q} = -k \nabla T$$

Where $\mathbf{q}$ is the local heat flux density, $k$ is the material's conductivity, and $\nabla T$ is the temperature gradient. The problem was, the temperature gradient was climbing exponentially. The outer edges of the heavy water were already boiling.

My pressurized living quarters sit right in the middle of this massive acrylic tank. The acrylic is two feet thick, rated for a maximum internal pressure of 150 psi.

The sensors read 144 psi.

And climbing.

If it hits 150, the tank shatters. If the tank shatters, 10,000 tons of boiling heavy water instantly floods my tin can, crushing me like a bug on a windshield. And even if by some miracle I survive the water, the loss of the shielding means the reality-overwrite wave will hit me instantaneously.

"Tabarnak," I yelled, scrambling out of the chair.

I needed to cool the water. Now.

The DIDP was designed to keep the heavy water at exactly 4°C, which is the temperature at which water is most dense. To do this, there is an industrial-grade liquid nitrogen ($LN_2$) cryo-cooler loop coiled through the bottom of the tank. Normally, it just pulses occasionally to keep the ambient temperature stable.

I sprinted to the thermal control panel. "Computer, engage emergency cryo-flush. Open the primary $LN_2$ dump valve."

The screen blinked.

ERROR: THERMAL REGULATOR VALVE 4 STUCK. MANUAL OVERRIDE REQUIRED.

"Of course," I screamed at the monitor. "Why would anything just work? This is exactly like the Water Temple in Ocarina of Time. Nothing but sheer misery and valves that refuse to open."

The $LN_2$ storage tanks and the primary valves weren't in the pressurized living quarters. They were in the sub-basement pump room, located directly beneath me, outside the primary environmental seal. It was kept at the ambient temperature of the mine shaft: roughly 5°C, and smelling heavily of nickel dust and damp rock.

I grabbed my heavy insulated jacket from the hook by the door, shoved my arms through the sleeves, and grabbed a heavy-duty steel wrench from my tool bench. I didn't bother zipping the jacket. I had maybe three minutes before the pressure hit 150 psi.

I threw open the floor hatch and half-climbed, half-slid down the steep metal ladder into the sub-basement.

The pump room was deafeningly loud. Massive turbines whined as they struggled to pump coolant that couldn't move. The air was frigid, and condensation dripped from the low ceiling. I flicked on my headlamp, the beam cutting through the gloom, and scanned the maze of frost-covered pipes.

"Valve 4, Valve 4..." I muttered, stepping over a thick bundle of fiber-optic cables.

I found it tucked behind the primary circulation pump. It was a massive, red, cast-iron wheel valve, coated in a thick layer of rime ice. The condensation in the air had frozen solid over the actuator mechanism, locking the gears in place. The automated servos were whining, trying to turn it, but the ice had cemented it shut.

I checked my watch. 147 psi.

I stepped up to the valve, gripped the red wheel with both hands, planted my boots on the diamond-plate floor, and pulled with everything I had.

It didn't budge a millimeter.

"Come on!" I grunted, straining until my vision swam. Nothing. I let go, panting, my breath pluming in the freezing air. I am a physicist, not a bodybuilder. My upper body strength is best described as "adequate for lifting textbooks." I needed mechanical advantage. I needed torque.

$$\tau = \mathbf{r} \times \mathbf{F}$$

Torque ($\tau$) equals the radius of the lever arm ($\mathbf{r}$) times the force applied ($\mathbf{F}$). Since I couldn't magically increase the force my puny arms could generate, I needed to increase the radius of the lever.

I looked around frantically. In the corner, discarded during the initial construction of the lab, was a length of hollow steel scaffolding pipe, about four feet long.

"Perfect."

I grabbed the pipe, hauled it over to the valve, and slid the hollow end over the handle of my heavy-duty wrench. I wedged the jaws of the wrench between the spokes of the frozen red wheel. I now had a four-foot lever arm.

I checked my watch. 149 psi.

I threw my entire body weight onto the end of the steel pipe. For a terrifying second, nothing happened. The metal groaned, flexing under my weight.

Then, with a sound like a gunshot, the ice shattered.

The wheel lurched downward, spinning freely as the automated servos finally took over and finished the job. A deafening whoosh echoed through the sub-basement as hundreds of gallons of liquid nitrogen, sitting at a balmy -196°C, flooded into the cooling jacket surrounding the heavy water tank.

I collapsed backward onto the metal floor, gasping for breath, staring up at the maze of pipes. The ambient temperature in the room plummeted immediately as the chill radiating off the pipes hit the air.

"Take that, entropy," I wheezed, letting my head fall back against the grating.

I dragged myself up the ladder and back into the control room. I collapsed into my chair and looked at the telemetry monitor.

The pressure had stopped climbing at 149.6 psi. As the $LN_2$ flash-froze the outer layers of the heavy water, absorbing the massive heat flux, the internal pressure began to rapidly drop. 145... 130... 110 psi.

I let out a long, ragged sigh of relief. I had done it. I had used basic thermodynamics to stop the reality-boil.

But as I sat there, my adrenaline fading, another sound caught my attention. It wasn't an alarm. It wasn't the hum of the ventilation. It was a sound that made the blood freeze in my veins.

CREEEEAAAK.

It was a deep, resonant groan, coming from the curved acrylic wall of the living quarters.

I pulled up the structural diagnostics.

When you take a material—even impact-resistant, two-foot-thick acrylic—that is currently being subjected to near-boiling temperatures on the outside, and you suddenly introduce liquid nitrogen into the cooling jacket surrounding it, you create a massive, instantaneous temperature differential.

Things expand when they get hot. They contract when they get cold. When one side of a material contracts violently while the other side is still hot...

SNAP.

A sharp, cracking sound echoed through the tin can.

I watched in abject horror as a spiderweb of white fractures suddenly materialized in the thick acrylic wall right next to my bunk, about three feet long.

I had stopped the boiling. But the thermal shock had just compromised the structural integrity of my only shield. And the reality-overwrite wave was still moving inward, now 4.2 centimeters closer than it was an hour ago.

I stared at the fracture, then at my empty mug of instant coffee on the floor.

"Okay," I whispered to the empty room. "No more liquid nitrogen."

CHAPTER 1

LOG ENTRY: DAY 214

I am a man of science. I deal in observable facts, quantifiable data, and rigorous peer review. I do not believe in ghosts, I do not believe in magic, and I certainly don't believe the universe cares enough about me to play practical jokes.

But right now, the universe is being a real dick.

To understand why, you need to understand where I am. I’m sitting in a pressurized tin can at the bottom of the Creighton Nickel Mine in Sudbury, Ontario. My laboratory—the Deep-Ice Decoherence Project, or DIDP—is exactly 6,800 feet below the surface of the Earth. I am surrounded by two miles of solid Canadian bedrock and an acrylic vessel containing 10,000 tons of ultra-pure heavy water.

My job is to measure the decay of protons to a degree of accuracy that would make Einstein weep. I am currently on month seven of a twelve-month solitary rotation. I sit here in total isolation for a year at a time, making sure that the fundamental building blocks of matter aren't quietly falling apart. The heavy water and the rock shield my sensors from all cosmic background radiation. It’s the quietest place in the solar system.

I am literally the most isolated human being on the planet.

It’s also the most boring.

To keep myself from going completely insane, I brought down a 4-terabyte, air-gapped hard drive. It contains the pinnacle of human achievement: an entire archive of 90s and 2000s pop culture. Every Nintendo 64 game, thousands of movies, and all nine seasons of Seinfeld. It is my lifeline. When you are hiding two miles underground to avoid dealing with a messy breakup and the general exhausting nature of other human beings, you need a distraction.

Every morning at 0600, my comms terminal connects to the surface via a mile-long fiber-optic cable. It downloads a compressed text packet of daily news and Wikipedia updates. It’s a one-way data dump just to keep me tethered to civilization. If you had told me a year ago that my greatest enemy two miles beneath the Canadian shield would be a dial-up modem sound, I would have asked to check your vitals.

Today, while the packet was downloading, I decided to fire up a classic. I booted up Forrest Gump. I’ve seen it maybe thirty times. It’s a masterpiece.

I was at the bench scene. You know the one. Tom Hanks is sitting there with his box of chocolates, talking to the nurse.

He looks at the camera and says, "My mama always said, life is like a box of chocolates. You never know what you're gonna get."

Classic. Iconic.

Except, I paused it right there because I couldn't remember what year it won Best Picture. I spun my chair around to my work terminal, opened the freshly downloaded surface data packet, and queried the Wikipedia scrape for the movie.

There, under the "Legacy" section, the article read:

>

I scoffed. Was. What an idiot. Some troll had vandalized the Wikipedia page right before the surface script scraped it for my daily download.

But I had nothing but time, so I dug deeper into the text packet. I checked the IMDb scrape. I checked the archived Reddit threads included in the pop-culture dump.

Every single reference said "was". Life was like a box of chocolates. People were debating it. Whole forums were dedicated to people claiming they remembered it being "is," while the "facts" proved it had always been "was." They were calling it the Mandela Effect.

I rolled my eyes. Mass confabulation. A bunch of people misremembering a vowel sound. The human brain is a notoriously terrible hard drive. We overwrite our own memories all the time based on suggestion.

But to prove them wrong—and to satisfy my own petty, burning need to be right—I decided to extract the audio file from my offline, air-gapped copy of the movie and compare it to a digital audio snippet included in the surface packet.

I wrote a quick Python script to isolate the exact 2.4 seconds of audio from both files. If it was just a pronunciation quirk—Hanks swallowing the "s" in "is" so it sounded like "was"—the acoustic waveforms would be mathematically identical.

I ran a Fast Fourier Transform to analyze the audio frequencies.

I stared at the two graphs on my monitor.

They didn't match.

It wasn't a subtle difference, either. The phonetic structure of a short 'i' sound versus a 'w' sound creates entirely different acoustic signatures. My offline file had a clear, distinct spike in the 2000-3000 Hz range—the 'i' in "is."

The surface file—the one representing the outside world—had a low-frequency rumble characteristic of a 'w'.

My heart did a weird flutter in my chest.

Okay, Elliot, I thought. Someone on the surface digitally altered the movie file. But why? Why would someone alter every digital copy of a 1994 movie, modify the subtitle sync files, and change every text reference on the internet, just to change one verb? And how did they alter the physical DVD copies people had in their homes?

I am a metrologist. When the data doesn't fit the model, you don't throw out the data. You test the baseline.

I swiveled to my primary console. The DIDP sensors are designed to measure the universe at the quantum level. They constantly monitor the fine-structure constant—the number that dictates the strength of electromagnetic interaction between elementary particles.

Usually, $\alpha$ is a dimensionless constant:

$$\alpha = \frac{e^2}{4\pi \varepsilon_0 \hbar c} \approx \frac{1}{137.035999}$$

I pulled up the live telemetry from the heavy water tank.

The number wasn't 1/137.035999.

It was 1/137.035998.

The fundamental electromagnetism of the universe had shifted by a fraction of a decimal point.

I froze. The humming of the lab’s ventilation system suddenly felt incredibly loud.

I looked at my air-gapped hard drive. It was sitting on my desk, totally disconnected from any network. It had been sitting there, two miles underground, surrounded by 10,000 tons of radiation-shielding heavy water, for 214 days.

I looked back at the surface data packet.

The universe didn't digitally alter a Tom Hanks movie. The universe changed.

Sometime in the last 24 hours, the timeline of reality was rewritten. A butterfly flapped its wings in 1950, or a quantum state collapsed differently at the dawn of time, and it rippled forward, changing the fine-structure constant and causing a screenwriter in 1994 to type the word "was" instead of "is."

The whole universe updated to the new software patch.

Except for my lab.

Because of the heavy water and the two miles of bedrock, I am sitting in a quantum-shielded Faraday cage. The reality-overwrite wave hit the Earth, but it couldn't penetrate the DIDP shielding.

I didn't misremember the quote. My hard drive is an artifact from a timeline that no longer exists. I am officially the last human alive who remembers the original timeline.

A red warning light flashed on my primary console.

WARNING: VESSEL PRESSURE ANOMALY.

I checked the sensor feeds. The outer edge of the heavy water tank was experiencing massive thermal fluctuations. He calculates that his heavy-water tank is protecting him, but it's boiling away at the edges. The new timeline—the one where Forrest Gump speaks in the past tense—is physically pressing against my reality bubble. The friction between the two collapsing timelines is boiling the heavy water on the outer edges.

The shielding is failing. The new reality is eating through my tank at a rate of roughly 4.2 centimeters per hour.

I did some quick mental math. Based on the radius of the tank, the reality overwrite will breach my pressurized living quarters in exactly 94 hours.

When it does, I will be overwritten. My memories of the original timeline will be erased, and the Elliot Vance who sits here will cease to exist, replaced by whatever version of me belongs to the new timeline.

I have four days to figure out how to stop a quantum reality collapse using nothing but particle physics, duct tape, and my Nintendo 64. And based on the escalating alerts on my metrology board, this reality bubble is going to pop in about four days.

My mother is from Quebec. She taught me that when the universe fundamentally breaks and you are facing imminent existential erasure, the only appropriate word to use is tabarnak.

Tabarnak.

LOG ENTRY: DAY 214 (2)

Okay, the initial panic attack has subsided. Mostly.

I spent the last twenty minutes hyperventilating into a brown paper bag, which was highly undignified but biochemically necessary. Now, I have a whiteboard marker in my hand, and I am going to science the shit out of this.

If I don’t get rescued by my own ingenuity, I’m dead anyway. Well, not dead. Just erased. Which, from my perspective, is functionally identical.

Let's break down the problem into small, logical steps.

Problem 1: A localized quantum decoherence wave is eating my house. Problem 2: I have no way to map the exact shape and speed of the collapse boundary. Problem 3: I am out of instant coffee.

I will tackle Problem 3 first, because it is the only one I am currently equipped to solve. I rip open a new bag of freeze-dried dirt crystals, dump a scoop into a mug of lukewarm water, and chug it.

Now, back to Problem 2.

To figure out how to stop this reality collapse, I need data. The metrology board tells me the fine-structure constant has changed, and thermal sensors tell me the outer edges of the 10,000-ton heavy water tank are boiling. But I need to know exactly where the boundary is right now.

I need to place localized quantum sensors at varying depths inside the heavy water tank.

The issue is that DIDP wasn't built for a reality-overwrite scenario. The sensors I have are meant to be mounted rigidly to the lab's exterior hull. They aren't meant to be floated freely in thousands of gallons of water. To get accurate depth readings, I need custom, watertight buoyancy housings that can hover at exact calculated depths.

And I can't exactly run to the hardware store.

I survey my living quarters. It’s a pressurized cylinder roughly the size of a spacious mobile home. It’s packed with monitors, life support gear, and my personal belongings.

My eyes land on a large, intricately constructed grey plastic ship sitting on my designated "recreation" desk.

The 7,541-piece Ultimate Collector's Millennium Falcon.

I let out a long, painful sigh. It took me three weeks to build that. I sorted the pieces meticulously. I watched all ten seasons of Stargate SG-1 while snapping those beautiful little bricks together.

But LEGO bricks are manufactured to a tolerance of 10 micrometers. They are made of ABS plastic, which doesn't react with heavy water. I can snap them together to create modular, perfectly calculated volume displacements. They are literally the best precision engineering material I have in this bunker.

"I’m sorry, Han," I whisper to a tiny plastic figurine.

I begin dismantling the Falcon. It hurts my soul. Every snap-crack of parting plastic feels like a personal failure, but I sort the plates and bricks into neat piles.

I need to create five sensor arrays. I calculate the required displacement. Heavy water ($D_2O$) has a density of $1.11 \text{ g/cm}^3$, which is about 11% denser than normal water. I run the math on a notepad:

$F_b = \rho \cdot V \cdot g$

To achieve neutral buoyancy at specific depths, I need the LEGO housings to displace exactly the right amount of heavy water to counteract the weight of the sensor and the plastic itself.

I spend the next four hours snapping bricks together, sealing the seams with a layer of waterproof resin from my suit repair kit. I embed a quantum sensor in the center of each grey, blocky sphere. They look less like high-tech metrology equipment and more like abstract, cubic Death Stars.

I carry the five arrays into the small airlock that connects my living module to the heavy water tank.

Normally, no one goes into the tank. It’s sealed. But there's a manual service hatch designed for robotic submersibles. I cycle the lock, crack the hatch, and the sharp smell of ozone hits me.

I carefully release the five LEGO-housed sensors into the dark, freezing water. They bob for a second, then slowly sink, settling at their perfectly calculated depths.

I seal the hatch and rush back to the main console.

Data begins streaming in.

I am officially mapping the edge of a reality collapse. The data confirms my worst fears. The boundary is a perfect sphere, slowly shrinking inward toward my lab.

But there’s a blip in the data stream. Sensor 3—the one suspended exactly three meters from the outer edge—is transmitting garbage.

I frown and tap the monitor. "Come on, little guy. Give me the Planck readings."

The screen flickers.

Suddenly, my vision swims. The dark metal walls of the DIDP lab dissolve into static. The low hum of the ventilation system vanishes, replaced by a jarring, terrifying sound:

Birds.

I am standing in a sunlit kitchen. The smell of fresh tourtière and brewing espresso hits me like a physical blow. I look down. I’m not wearing my DIDP lab jumpsuit. I’m wearing a blue flannel shirt.

And a silver wedding band on my left ring finger.

CHAPTER 2