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Beto is a lonely man who works as Ranger of the isolated Peninsula Valdes' National Park (Chubut, Argentina). Lover of the nature and animals, the peace of his days watching orcas, seals and sea lions in the sea ends after the arrival of Lola, a Spanish mother who travels there from Madrid with his autistic 11 years old son Tristán looking for Beto after both watch him in a doc...。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 ...。