16 年前
搜影视
当人类不停地开拓世界的同时，另一个高贵而神秘的种族选择了深藏于地下。他们称自已为血族，而人类则叫他们吸血鬼。。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 ...。