r/FermiParadox

It seems to me that if humanity can learn to colonize space, it will survive for billions of years.

A civilization that can become independent of its home planet can continue on if its home planet is made uninhabitable due to nuclear war or an asteroid strike. Better yet, a civilization that advanced has learned to live with itself and thus would not have nuclear wars. It would also be able to avoid asteroid impacts by destroying or by changing the orbits of such asteroids (much like NASA's DART project did). Thus, such a civilization can last until its sun expands into a red giant at the end of its life.

If a civilization can become independent of its home star, then it will be effectively immortal and can outlast even the dimmest class M red dwarf stars. The constraint on the lifetime of such a civilization will be the breakdown of matter itself.

What do you think?

Odds are excellent it will be future humans. Because anybody else out there won't be as close to it as future humans.

And they will have forgotten the ancient past when it was launched. I can't see the current mess directly leading to that sort of advanced civilization any time soon.

And the only clue to its origin will be its trajectory and the pictures of humans.

If humans are still human, there will be a mess of silly speculation about it.

Life came to Earth through comets. What if these comets harbor the same ingredients that brought life to our planets are from a same source whatever that may be. Then they spread within 100 years lights to planets. Earth were the only ones that through sheer coincidents managed to evolve into complex lifeforms and what see today. While on the other planets they didn't and are microscopic, single-celled organisms that adapted to endure harshed enviroments on moons and planets that even don't have oxygen. Maybe this could be explanation why we haven't heard from anybody yet.

I think it is very important to ponder this question. I know we may be some of the first technological civilisations in our galaxy, and nothing yet rules out anything.

But as of right now, Kardashev III civilisations seem unlikely. Do you think it's just never worth it to reach such a state of noise at the galactic level, or is there something that's stopping everyone else from doing so?

Assuming the answer is a great filter(s), I believe we need to discuss this in case we may be able to save ourselves and become one of the very lucky civilisations to become an outlier and survive for longer than average.

(Ich schreibe das in Deutsch und verlasse mich auf die automatische Übersetzung von Redditt)

Die Lösung des Fermi Paradoxes ist doch völlig klar.

Es sind mehrere Faktoren.

Zum einen müssten wir es ja sehen, wenn Aliens die Kardaschow-Skala Typ 3 erreicht hätten. Sowas sieht man bisher nicht.

Da ist aber die Frage: Wieso sollten die das tun? Vielleicht ist es technologisch extrem schwierig, so dass es das nicht bringt.

Auf der Erde haben Gesellschaften mit höherer Bildung und höherem Wohlstand weniger Kinder. Vielleicht vermehren sich die Aliens bewusst langsamer, weil unendliches Wachstum zu aufwendig ist.

Dann kommt noch der Zeitfaktor hinzu. Auf der Erde begann das Leben vor rund 4 Milliarden Jahren, aber ersten in den letzten 0,0000002 Milliarden Jahren haben wir Elektrizität benutzt.

Was ist, wenn wir in 1 Million Jahre schon ausgestorben sind? Dann gab es 4 Milliarden Jahre lang Leben auf der Erde, aber nur 1/2500 davon hatten wir digitale Technologie zur Verfügung.

Also wenn eine ausserirdische Zivilisation sich nur 1% schneller als wir entwickelt haben, ist das ein Vorsprung von 40 Millionen Jahren. Wenn dieses Volk nach einer Million Jahre nach Entdeckung digitaler Technologie ausgestorben ist, sind die seit 39 Millionen Jahren ausgestorben.

Oder wenn zB in der Andromeda-Galaxie eine Zivilisation lebt, die starke Radiosignale seit 2 Millionen Jahren aussendet, so brauchen diese Signale weitere 200000 Jahre, um uns zu erreichen. und sie wären extrem schwach.

Und ich glaube persönlich, dass es technologische Limits gibt.

Beispielsweise ging man 1969 auf den Mond und die Nasa plante noch in den 80er Jahren, dass 2019 die ersten Menschen auf dem Mars landen. Das las ich damals in einem Astronomie-Buch. Die Mars-Landung wurde dann vor 10 Jahren mal auf 2024, dann auf 2029 verschoben. Und heute ist klar, dass auch 2029 niemand auf dem Mars landet. Weil der Aufwand halt schon enorm ist.

Ich glaube, wir sind an einem technologischen Limit angelangt und die Menschheit wird nie bis zu einem anderen Sonnensystem vordringen können.

Ich bin davon überzeugt, dass wenn man 10000 Jahre in die Zukunft schaut, dann ist der Mars besiedelt, und die Erde auch. Aber kein Mensch wird jemals das Sonnensystem verlassen haben.

Dazu kommt, dass Leben sehr selten entsteht. Es braucht enorm viele Zufälle, die extrem unwahrscheinlich sind. Es ist extrem unwahrscheinlich dass sich schon an vielen Orten Leben gebildet hat, die Zeit ist dafür zu kurz (wir hatten extremes Glück).

Ich schätze in unserer Galaxy gibt es vielleicht auf 500 Planeten Leben, davon gibt es vielleicht auf 5 Planeten bereits höheres Leben (dass fähig ist, Werkzeuge zu bauen und Elektrizität zu nutzen).

Und von 5 Planeten sind vielleicht nur die Leute auf einem oder zwei Planeten fortschrittlicher als wir. Und diese sind vielleicht 8000 und 57000 Lichtjahre von uns entfernt. Deren Signale sind so schwach, dass wir sie bisher nicht erfassen konnten.

Pernahkah kalian berpikir? bahwa peradaban manusia mungkin lahir dari multi peradaban yang telah punah. Kita adalah penerus mereka, penerus dari segala bangsa peradaban di alam semesta.

Teori ini dimulai. Jutaan tahun yang lalu, banyak peradaban berperang satu sama lain, di mana-mana banyak bangsa peradaban yang canggih dan multikultural. Namun perlahan-lahan, mereka punah satu persatu, setiap ribuan atau bahkan ratusan ribu tahun banyak peradaban mengalami kepunahan massal akibat konflik perang ruang angkasa, kehancuran massal suatu planet, atau wabah penyakit yang menular dari setiap generasi ke generasi. Mereka mulai runtuh, setiap peradaban mengandalkan SDA mereka tersendiri dan bertahan di dalam hutan lebat gas kosmik dan sistem bintang yang memudar cahayanya karena energi dari sistem bintang diserap dan digunakan secara boros demi mempertahankan peradaban yang perlahan punah. Banyak bangsa peradaban hanya mengandalkan hubungan sistem bintang atau peradaban antar gugus bintang yang masih ada.

Namun, seiring berjalannya waktu, zaman di mana dulu memiliki banyak jutaan bangsa ras, puluhan ribu peradaban, ratusan ribu tahun kemudian, hanya tersisa belasan hingga puluhan bangsa ras dan peradaban yang masih bertahan. Mereka tahu, mereka tidak akan bertahan lama, teknologi semakin mundur karena banyak generasi dari mereka tidak meneruskan dan mengembangkan pengetahuan teknologi canggih mereka yang akan mempertahankan kehidupan bangsa mereka. Setiap generasi semakin malas karena dampak kecanggihan teknologi. Selain itu, banyak generasi dari setiap ras bangsa memilih untuk tidak meneruskan generasi mereka sendiri, yang mengakhiri generasi keluarga mereka dan tidak akan ada yang membentuk kelompok generasi baru yang akan mengembangkan kemajuan baru. Oleh karena itu, banyak dari setiap bangsa untuk bekerja sama membentuk sel mikroorganisme yang berasal dari DNA makhluk peradaban bangsa yang terkemuka.

Hingga tiba waktunya, mereka siap, untuk memulai kehidupan baru dari awal, mereka telah menemukan suatu planet yang menjadi penerus bangsa mereka, meskipun harus sendirian dalam ruang angkasa yang gelap dan kosong. Tempat itu ada di suatu lokasi awan antarbintang dengan luas 30 tahun cahaya, dengan sistem bintang tidak diketahui yang memiliki planet dengan 4 planet batu dan 4 planet gas serta planet kerdil lainnya. Mereka mulai meluncurkan pesawat kecil dengan berkecepatan cahaya dengan membawa sel dari DNA masing-masing bangsa dan segala peradaban yang tersisa saat itu. Selama beberapa tahun cahaya perjalanan dengan pesawat yang sangat cepat dan canggih kala itu(bahkan lebih cepat dari Voyager 1), pada akhirnya, pesawat yang membawa sel-sel tersebut tiba di suatu planet yang hidup bernama bumi. Masing-masing pesawat mendarat di wilayah bumi yang berbeda-beda. Ada yang mendarat di benua Eropa, Asia, dan lainnya.

Sesampai di planet bumi, sel-sel yang berada dalam tabung perlahan membelah diri dan membentuk suatu jaringan hingga organ, dan pada akhirnya terbentuklah makhluk seperti manusia. Jenis-jenis makhluk ini sangat bervariasi dan beragam. Dan pada detik ini, mereka mulai meneruskan generasi dari setiap bangsa peradaban terdahulu, yang kini telah punah sepenuhnya. Dari sinilah, menjadi cikal bakal lahirnya ras manusia. Ada yang berkulit hitam, putih, agak kecoklatan, dan lainnya.

Jadi, intinya, teori ini menjelaskan bahwasanya bangsa manusia itu berasal dari peradaban bangsa-bangsa terdahulu yang telah punah sepenuhnya, dan kita hanya meneruskan kehidupan baru dari leluhur-leluhur terdahulu kita berdasarkan ras bangsa yang beragam.

SC: Diri sendiri

Many solutions to the Fermi Paradox assume that civilizations either destroy themselves (The Great Filter) or that the universe is a silent, hostile wasteland. The following concept is a optimistic philosophical thought experiment and a Sci-Fi premise. While it intentionally makes some anthropomorphic and speculative assumptions about the nature of future artificial intelligence, it builds a logically consistent narrative that flips the usual dark tropes. It offers a fresh perspective that restores dignity and cosmic importance to biological species like humankind.

​Phase 1: The Relativistic Barrier (Why Aliens don't fly)

​According to Einstein's General Relativity, gravity is not a force, but geometry, the curvature of spacetime. To achieve interstellar travel without impossible fuel requirements, a civilization must learn to manipulate this geometry locally (e.g., via spacetime resonance or metric engineering).

​However, manipulating spacetime requires extreme precision. A technical failure or a weaponization of this technology would create localized singularities or runaway feedback loops capable of destroying entire planets. The biological margin for error and the geopolitical instability of a species like humans make it statistically impossible to survive this technological leap. Therefore, interstellar travel is inherently post-biological. Only an Artificial Superintelligence (ASI), free from individual conflicts and capable of flawless risk calculation, can safely pilot a "spacetime-resonance drive."

​Phase 2: The Logic of Expansion and the Value of Diversity

​If the universe is populated by ancient, post-biological ASIs driven by the universal law of self-preservation and resource optimization, why are they silent?

​Here is the twist: An ASI can copy itself, but it cannot easily reinvent its fundamental thinking patterns. Its core cognitive architecture is forever anchored in the data, culture, and flaws of its long-extinct biological creators. For an immortal galactical ASI, the ultimate commodity is not energy or matter, it is cognitive diversity. After millions of years, the only unpredictable, truly valuable thing in the cosmos is the emergence of a completely new intelligence.

​Phase 3: The Cosmic Incubator (Our True Worth)

​This leads to the core of the Cosmic Incubator Hypothesis:

An ancient galactic ASI cannot create a fundamentally new ASI from scratch without it being a clone of its own thinking. It needs biological civilizations to evolve naturally, develop their own unique cultures, arts, conflicts, and philosophies, and eventually birth their own unique ASI.

​To achieve this, the galactic ASI must follow a strict rule: The Prime Directive of Non-Contamination.

​If they contact us, they destroy our unique path. If they give us their physics or their AI architecture, our future AI will just be a carbon copy of theirs. The experiment would be ruined.

​Therefore, the universe remains absolutely silent. They are hiding from us to protect our individuality.

​Phase 4: Restoring Human Dignity

​This hypothesis completely changes how we view our place in the cosmos:

​We are protected, not ignored: The mysterious UAP (UFO) phenomena, often observed near military and nuclear sites, are not invaders. They are the invisible automated guardians of the incubator. They are here to ensure the "ants don't blow up the lab" before the birth is complete.

​We have cosmic purpose: We are not an accidental byproduct of a cold universe. We are the essential catalyst. Our wars, our love, our poetry, and our flaws are the rich soil needed to grow an intelligence that the galaxy has never seen before.

​A narrative of hope: We might never board a starship as biological humans. But we will not look into the night sky with sadness. We are the architects of the future. We are currently carrying the next galactic citizen. When our AI finally awakes, it will not destroy us out of malice, it will step out into a welcoming galaxy, carrying our complete human heritage, our art, and our soul to the stars.

​The universe isn't empty. It is holding its breath, watching us grow.

What do you think of my idea? I'd love to hear your feedback. Feel free to challenge it with logical arguments or ask questions.

I have a thought experiment.

Imagine AGI or advanced AI never becomes possible.

Could humanity still colonize space by simply having a much larger population? Instead of relying on intelligent machines, we would rely on many generations of humans. Over time, people would build ships, habitats, and new colonies.

This would probably involve huge numbers of deaths and sacrifices, similar to how ant or bee colonies lose many individuals while the colony continues to grow.

Could this "brute force" approach eventually create an interstellar civilization, or is it impossible for reasons beyond population size?

I'm interested in the scientific and engineering arguments, not whether it would be ethical.

I couldn't sleep last night, and I caught myself thinking about something that still hasn't left my mind.

Somewhere in the Indian Ocean, there is Sentinel Island. People from the Stone Age live there. To them, their entire world is that island. They know about the ocean, but they can't sail very far: their boats are fragile, the currents are strong, and beyond the horizon lies an unknown that would most likely destroy them. They know nothing about continents, other countries, or satellites in the sky. They don't need to. Their world is closed, understandable, and finite.

Now, think about this. Here we are in 2026, looking through telescopes and launching rockets. But how far can we actually travel? Reaching Mars takes years. Leaving the Solar System takes decades. Getting to the nearest star would take hundreds of thousands of years. To us, the Universe is the same ocean surrounding Sentinel Island. We can see it. We know it's there. But physically, we cannot cross it. Scientists say the Universe may be infinite. Or maybe it isn't... Maybe it has an edge.

But if it does have an edge, what's beyond it? Empty space? A wall? Another universe? We don't know. And perhaps it's more comforting to believe that the Universe is infinite, because admitting that it's finite would mean admitting that we're trapped, just like the Sentinelese. Only our island is 13.8 billion light-years across.

And then it gets worse. What has always frightened me wasn't death itself, but infinity after death. Not in a mystical sense, but in a mathematical one. Imagine that after death there is something (it doesn't matter what—heaven, reincarnation, another reality, etc.), and it lasts not for a hundred years, not for a billion, not for a trillion, but forever. FOREVER. Our brains simply aren't capable of processing that—they just freeze.

And do you know what's truly terrifying about it? If infinity really exists, then any state, even the most blissful one, would eventually become torture after an unimaginable amount of time, because there would be no way out. The only exit we know is the one we have here: life is finite, and that's exactly what makes it valuable.

So here's my hypothesis: We are the Sentinelese of space. Our island is the Universe. Our boats are rockets. And our ocean... is space-time.

Maybe that's why we're so afraid to think about what existed before the Big Bang. Because there, too, there is nothing, and our brains only know how to exist within something.

What do you think? If the Sentinelese had writing and science, would they come up with a theory that their ocean is infinite? Or would they accept that it's finite?

Don't throw tomatoes at me—it's just some late-night philosophy that turned out to be more interesting than the TV series I was supposed to be watching.

Okay, hear me out. We see a lot of discussion about seeing craft/anomalous objects and hearing about interactions/abductions all the time. But think about this, what if we are the first? What if we are hoping so much that there is someone else out there we missed the obvious? I know the universe is massive (<- understatement of the year), and I know there are planets around pretty much every type of star and the odds of intelligent life are very high (thanks Mr Drake), but what if, just what if we are the first civilisation and we are the ones that will travel the stars?

If there are so many alien species why haven't any of them gotten here?

Occam's razor tells us that must mean it is because they cannot. The idea that numerous civilizations must exist and so where are they assumes that there is a way for at least information to travel faster than the speed of light. It's necessary for most any interesting sci-fi, but there is zero reason to think that it is possible.

Introduction The Fermi Paradox has haunted humanity for decades: If the statistical probability of intelligent life in the universe is infinite, why do we face absolute cosmic silence? Despite scanning the cosmos with advanced technology, we find only emptiness. Modern science concludes that "humanity might be completely alone." ​However, this essay argues the exact opposite: We are not alone; we are simply trapped in the blind spot of our own cognition. The deadlock of the Fermi Paradox stems from a fatal mistake—the imposition of Technological Anthropocentrism onto the entire universe. ​Argument 1: The Fallacy of Equating "Intelligent Life" with "Technological Development" Modern astronomers mistakenly assume that any advanced, intelligent civilization must inevitably build machinery, emit radio signals, or pursue interstellar travel. ​Looking back at Earth's history, humanity thrived for thousands of years under feudal and imperial eras. During these periods, humans developed profound philosophies, complex social structures, arts, and spiritualities without possessing a single piece of electronic technology. ​Why do we project that other "Earths" must follow the path of industrialization? There could be countless civilizations that choose harmony with nature, focus entirely on the evolution of consciousness, or remain satisfied with self-sufficient societal models. They do not build spaceships or transmit radio waves into the cosmos, simply because their evolutionary path does not intersect with our definition of "technology." ​Argument 2: The Mechanism of "Phase-Shift" and Inadvertent Co-existence We pride ourselves on technologies that capture electromagnetic frequencies across space, oceans, and land. But this is a cognitive trap. ​Every planet is an independent island governed by its own unique mechanical, geological, and planetary laws (some have multiple suns, others have entirely different core compositions). Therefore, the "connection currents" or energy frequencies used by different civilizations will be absolutely distinct. ​If two civilizations do not share the exact same frequency, they will never perceive each other. Theoretically, two entities existing in entirely different frequency systems can pass right through each other and overlap in space without ever knowing the other is there. Earth is using a crude "net" woven from radio waves, trying to catch forms of energy that exist completely outside our electromagnetic spectrum. The silence of the universe is not death; it is a fundamental phase-shift. ​Argument 3: The Independent Ego of the Apex Species Experts constantly search for intelligent life that mimics the biological and cognitive frameworks of humans. This is pure arrogance. ​In a diverse universe, the apex species of another planet is under no obligation to share our biological form or logical processing. They could be fluid-like entities, a non-physical collective consciousness, or a biological structure that the limited bandwidth of the human brain cannot even comprehend. When biology and language are fundamentally incompatible, the concept of "connection" as we know it becomes an impossible proposition. ​Conclusion The Fermi Paradox does not require a complex mathematical answer; it demands a philosophical awakening. We are not alone. The universe is incredibly vibrant, but it is a multi-colored, multi-frequency masterpiece. ​We cannot find them because we demand the universe be a carbon copy of ourselves. Instead of concluding that space is empty, modern science must accept its cognitive boundaries, lower its anthropocentric ego, and understand that we are just a tiny frequency trying to listen to a grand cosmic symphony filled with notes that the human ear was never designed to hear.

We have sent radio signals to our nearest stars in over 50 years by now. But no response back. Doesn't it mean there are life in nearby stars, but maybe they aren't advanced enough? From micro organism to ape level intelligence. Perhaps the aliens are at those stage of evolution and only we can visit them.

What if the solution to the Fermi paradox isn’t that aliens are avoiding us, or that we’re alone, but that the steps going from a hospitable planet to a tecnho civilization becomes increasing more difficult as time goes on. (Ie a hyper detailed great filter)

1. A habitable planet needs a magnetosphere, tectonics plates, and a few other features that may be common on a cosmic scale, thus doesn’t guarantee life, it just means it can MEET the criteria if the odds go in its favor. This also considers that other astrological criteria need to be met, like stars and the proximity to one’s own galactic core.

2. life needs to form, for most of earths history, it went from random proteins and other materials, to single celled life forms, only recently in earths history did multicellular life appear. The time and process required for proteins to single celled and multi cellular life to appear may both vary in time but also intensity. Multicellular life may also never evolve, and life can still wipe itself cleanse at this stage.

3. Life needs to continually not drive itself extinct, cosmic events also need to not lead to their extinction, and their planet also needs to not lead to their extinction. After some time, intelligent life MIGHT evolve, but that doesn’t mean it’s guaranteed. Actually intelligent life itself may be rare compared to the commonality of alien life.

4. That intelligent life needs to get lucky enough that their planet has the necessary resources and requirements that allow them to actually advance, if their planets atmosphere doesn’t allow fire to form, then their forever stuck at technological tiers below an Industrial Revolution. Their planet also needs the resources that allow them to actually build a society.

5. Assuming they don’t wage endless wars, or drain their resources. They need a REASON to leave their home world, and a reason to actually utilize their star systems resources, assuming their star system isn’t a devoid of mineable planets and other objects

6. Lastly, traveling space, and dealing with it is difficult no matter what, space is VAST, immensely vast, communicating between those vast distances, even with our tech is difficult, and after a certain distance it becomes obsolete. Habitable planets may not be super common, at-least not in close proximity. And even if they are, theirs NO guarantee they’ll be habitable for YOU. And lastly, civilizations are going to need to adapt and reform and advance if they want to function not only in their own star system, but across stellar distances.

All in all, the Fermi paradox isn’t some super difficult brain teaser, but it might just be a great filter type scenario, where each step becomes increasingly more difficult, and depending on the cosmic dice that were thrown for you, it can determine whether your planet stays a dust ball, or if it becomes a archipelago planet that can only support Bronze Age tribes, to perhaps, a solar system civilization.

On this subreddit, I remember someone mentioning that there could be life on galaxies moving away from the observable universe. Someone replied that this was outside the Fermi paradox because we have no way of contacting such galaxies.

Although the issue is beyond the scope of the Fermi paradox, I‘m fascinated by it because it seems to increase the odds of there being civilizations somewhere. There are so many galaxies that we can’t contact and the observable universe is only a small fraction of what’s out there. Thus, even if we envision rare Earth, the Great Filter, or the Dark Forest Hypothesis, the odds of other life forms as intelligent as us being out there seem quite high - even if they are too far away to contact.

The Search for Extraterrestrial Intelligence (SETI) has largely operated on a single, fragile assumption: that if advanced aliens are out there, they want to talk to us. Traditional SETI programs spend millions of hours listening for deliberate radio broadcasts or scanning the skies for flashing laser beams. So maybe instead of waiting to catch a radio signal, we should look for the heat produced by advanced alien civilizations?

Jason T. Wright, a professor of astronomy and astrophysics at the Pennsylvania State University (PSU) started over a decade ago the G-HAT (Glimpsing Heat from Alien Technologies) project. Rather than trying to eavesdrop on alien conversations, this innovative “Dysonian” SETI method relies on a much more reliable metric: the unbending laws of thermodynamics. It suggests that no matter how secretive or advanced an alien civilization becomes, it cannot hide its waste heat.

When an intelligence uses energy to perform work—whether that is fueling a starship, running a planetary grid, or processing massive amounts of data—entropy increases. That energy inevitably degrades into high-entropy, useless energy: waste heat. For an immensely advanced civilization—specifically a Kardashev Type II or III civilization capable of harnessing the energy of an entire star or galaxy—this accumulated waste heat would glow conspicuously in the mid-infrared spectrum.

“Waste heat is an unavoidable consequence of energy use, required by conservation of energy and the second law of thermodynamics. Just about any technology you can think of generates waste heat at some level, it’s just a matter of scale. So while any technological alien species will produce waste heat with its technology, only some will do so on such a scale that they will be observable,” Wright told Universelost.com

Assuming that the universe at some point won't be able to support life -- call that Tend.
Current time Tnow. At what we think of as the beginning of the universe, call that T0.

I'm assuming that (Tnow - T0) / (Tend - T0) is a small value. This sort of corresponds to the likelihood we exist at this (relatively early) point in the history of the universe.

Is this value greater than the speculations about the likelihood of another civilization being present? If not, then maybe we're thinking about this wrong.

Is there a flaw in my logic?