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Polar bears
(mander.xyz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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Close enough that we probably helped bred them out of existence. Neanderthal genetic markers show up with some regularity in certain modern human populations.
Edit to add: While humans didn't breed them out of existence, we certainly did intermix with them. And that does help to maintain their existence yet today.