25 年前
视频简介
一块记载着外星生命轨迹的流星坠落到亚利桑那州的荒漠中后开始了进化。没几周，这些外星生命的形态就从单细胞的有机体进化到类鸟和类灵长的生物。外星生命的进化如此飞速，将会使得他们很快支配整个世界，并且导致人类的灭亡！。NOVA: Mysteries of Sleep Like virtually every other animal, humans need sleep to survive. But why? What do we gain from spending nearly a third of our lives in such a defenseless state? And what's at stake if we sleep poorly? The functions of sleep have long been something of a mystery. But now scientists are peering deep into the brain to see what happens while we snooze. One ...。
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