23 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 ...。神农架位于北纬31度，被称为神秘之地，甚至是人类的“伊甸园”。美国的凯文，前往神农架研究蛇，他这次的研究的是“宁陕小头蛇”，罗永斌向人们介绍着自己看到的“神农架野人”。神农架的大王蛇速度快，性格凶猛。在金丝燕洞里，吸引着许多的鸟类学者。。
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