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12年前，万林因故意杀人罪被判处死刑缓期两年执行，他在狱中服刑时，以芮志、夏伟等为代表的狱警的教育和改造下，弃恶从善，重新做人，一次次减刑之后被提前释放。回归社会后的万林以一颗忏悔和感恩之心，积极回报社会，见义勇为，助人为乐，自强不息，用自己的实际行动构筑了一幕幕重塑人生，艰苦创业的感人故事。。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 ...。