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Run the right way: like prehistoric man

Dan Lieberman tells Dr. Sanjay Gupta how human beings evolved to be great long-distance runners.

Mon Nov 04, 2013 @ 1:35:26 pm ET via CNN Video
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I’m a father of three, a practicing neurosurgeon, and a globe-trotting journalist. Join me as I go beyond the headlines, and offer insight to stories that shape the quality of life for you and your family. FULL BIO

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