Originally posted by Monash
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One thing that I think would be for certain is that survivors would likely regress/re-develop certain atavistic traits that have been lost since we transitioned from a hunter-gatherer species to an agricultural/city-based one. I imagine our sense of smell would get better, our jaws would again grow large enough to fit our wisdom teeth, our vision would improve, spatial intelligence would return, etc. We already have direct evidence that this process of atavism occurs simply by observing what has actually happened to several domesticated species that went feral for several generations, such as razorback boars, mustangs, dingoes, etc. Combined with what we already know from archaeology, we would be able to at least make educated guesses what would happen to us.
Not that it would do our potential successor species any good. The eggheads making the guesses, assuming they survived, would be too busy scraping up that fungus and/or digging for buried food, and along with everyone else would simply experience and see their descendants go through the process firsthand without giving it any second thought.
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