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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 ...。事情还从一间珠宝行被偷说起，警方很快就锁定嫌疑人--骑着单车，头戴白头巾的男子。然随着追查，发现嫌疑人数逐渐增加，这一切的一切，貌似都与一名叫伊克巴尔的人有关...。。