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《星际旅行: 深空九号》（Star Trek: Deep Space Nine,简称「DS9」）是第三代星际旅行系列剧集，从1993年至1999年总共播出了七季，该剧共获得3项艾美奖，9项其他各类奖和42项各类提名。「星舰进取号」及其船员为主角，而以记述围绕在「深空九号」（Deep Space Nine）太空站周遭所发生的事件为主。故事发生在2369年，深空九号太空站本来是卡达西人占领贝久后所建造的采矿太空...。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 ...。