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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 ...。笔下五千年，妙墨中国心。《妙墨中国心》是全国首档书法美育交互式电视文艺节目。节目邀请的书法名家、文化名家、书法爱好者将分别担任“守墨人”、“解墨人”、“寻墨人”，从不同视角来探寻书法背后的千年墨韵。。