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Watch National Geographic Documentaries online: Episode 1 The Incredible Human Body

The Incredible Human Body explores the enigmatic human body, showcasing its abilities -- and its potential -- by using revolutionary, cutting-edge imaging systems and the latest advances in science and technology to go inside the bodies of real people, right down to their stem cells. Following a couple trying to conceive, a professional athlete at the top of his game, and a man with a brain tumor, The Incredible Human Body shares in the personal stories of four extraordinary groups of people and explores the body from the inside out as never before.

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