17 年前
视频简介
《怦然心动20岁》是一档关注20岁少年群体的青春旅行社交真人秀，聚焦少年们的群像以及多元真实的个性标签，挖掘这个年龄层的少年们特有的人生思考。第四季少年们将走出国门，闯入热情的泰国夏天，开启一场青春四溢的热带之旅！。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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