20 年前
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 ...。大型史诗纪录片《神秘的西夏》以近些年对西夏学的最新研究成果为基础，以西夏王朝从兴起到灭亡的发展过程为历史线索，运用当今最先进的电视表现手段，对西夏的历史文化做了一次最全面、最综合的展现。。
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