The Evolution of Material Culture

Migration is also a form of adaptation to harsh environments. We didn't have clothes for much of that, so what we did was actually more behavioral in terms of just moving further south to where it was warmer because when you don't have the physiological mechanisms with feathers or anything, it's harder to insulate yourself. And deep, dark caves. Humans love a good cave. Whenever you find a cave, there's probably bones in there. Do we find a lot of dinosaur bones and caves? I mean, other than birds? Not really. So they didn't like caves? Well, it doesn't mean that they haven't been caves for forever.

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