Quote:
Originally Posted by Witty
I would imagine that the very earliest modern humans already had that instinct or whatever it is to sleep at night, as humans are basically ineffective in the dark anyway, but we also would have been in the food chain back then, and when you're in the food chain you sleep when you can, not when you want.
So yeah, it would have had to have been a concsious decision because it worked for the circumstance. It is in our nature to sleep at night, and I am pretty sure it always has been.
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So no evidence. I don't think any of ancient man's predators were nocturnal either. Not to mention, it's not like ancient man was out in the open at all times. I'm still pretty convinced that this style of sleep was never utilized or necessary.