Are we born to run? | Christopher McDougall

http://www.ted.com 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 ultra-runner, and the hidden tribe in Mexico that runs to live.... Read More إقرأ المزيد | Share it now!