About this talk: 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.

About the author: Christopher McDougall is the author of "Born to Run: A Hidden Tribe, Super Athletes, and the Greatest Race the World Has Never Seen." Full bio and more links

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