What didn’t change when cetaceans became aquatic?

I know cetaceans are related to even-toed ungulates. But let’s say hypothetically, all DNA evidence was destroyed in a fire. What physical or social traits do cetaceans share with ungulates, other than general mammal traits?

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u/PinkOneHasBeenChosen — 2 months ago

How did large dinosaurs incubate their eggs?

So, the thing about reptile eggs is that they can’t hatch at cold temperatures. Meaning animals in colder environments have to incubate their eggs or give birth. And no dinosaur I’m aware of was viviparous or ovoviviparous. Which leads to the obvious question: how on earth does a 6 ton animal sit on its eggs without crushing them? Or did hadrosaurs and Yutyrannus lay crush-proof eggs?

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u/PinkOneHasBeenChosen — 3 months ago

You should just move on.

I’m gonna start by saying the person who said this really does care about me, she’s just a little clueless.

So, the other day I was talking to my childhood friend’s mom about an issue I have continued difficulty with. She was kinda surprised that it was still a problem, and I said (paraphrased) “well, someone tried to fix it when I was younger, but they messed up and made it worse.” And then she said “that was a long time ago, you can move on”. I told her I can’t and she reiterated her point. And then I was like, I mean it, I can’t. And then I thought, wait a second… she knows I have PTSD from another event a decade ago. Even if it’s not related to the topic at hand, why would you say that to someone with PTSD?

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u/PinkOneHasBeenChosen — 4 months ago