Christopher Mc Dougall: Are we born to run

Christopher McDougall explores the mysteries of the human desire to run. How did running help early humans survive and what urges from our ancient ancestors spur us on today At TEDxPennQuarter, McDougall tells the story of the marathoner with a heart of gold, the unlikely ultrarunner, and the hidden tribe in Mexico that runs to live. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world s leading thinkers and doers give the tal