16 年前
视频简介
杜立德的女儿玛雅·杜立德已经长大成人，到了青春期，母亲将她送往道奇农场渡过夏天，在农场里遇到了许多新的伙伴，他们从互相排挤到最后相互帮助并共同努力在比赛中胜过了银矩农场，当然其中还要多亏了玛雅的动物伙伴们。。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 ...。
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