刚刚
视频简介
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 ...。流星将撞击洛杉矶。任何人、任何地方都有可能发生危机！救援的目的地从鲸鱼口中，到前往外太空都是他们职责范围。。
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