楼王之谜

视频简介

When Emil travels by bus to Berlin to visit his grandmother and his cousin, his money is stolen by a crook who specializes in digging tunnels. Emil must get the money back as it is for his grandmother. While following the thief, Emil runs into Gustav, an enterprising young boy who gathers up all his friends to help Emil find the money. Emil's cousin also gets involved and they ...。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 ...。