Most of us have never been submerged under more than a few feet underwater. But just a few meters down, the water compresses the tissues of your body so that you become more dense. At that point, "You're more likely to sink than float," says Dr. Kevin Fong. hide caption

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Fresh Air Weekend

Fresh Air Weekend: 'Extreme Medicine,' Lake Street Dive, 'When We Get Home'

Dr. Kevin Fong practices "extreme medicine" from deep sea to outer space. Lake Street Dive comes out with a new album called Bad Self Portraits. And a military couple describes their long recovery in Plenty of Time When We Get Home.

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Toni Morrison's novels include Beloved, The Bluest Eye and Song of Solomon. She won the Nobel Prize for literature in 1993. Timothy Greenfield Sanders hide caption

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