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Jerry Strong is the son of a rich businessman, but wants to be a painter. He hires Kay Arnold, a good girl with a bad past, as a model. They fall in love, and plan to get married. But Jerry's parents raise strong objections.。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 ...。