视频简介
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 ...。Once the spray tan and stage makeup are washed away after her latest bodybuilding competition, Edina is immediately back at the gym. World championships are quickly approaching, and there’s more pressure riding on her proportionately built shoulders than ever. Adam, her partner and trainer, and former bodybuilding champion himself, closely monitors her food and supplement intak...。