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? 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.

Christopher McDougall: Are we born to run?

Are we born to run?

Discover how humans' unique ability to run long distances, not speed or strength, may have been our ancestors' key survival tool.

Tarahumara tribe's lifestyle reveals running's potential in eliminating modern ailments like heart disease and depression.

By embracing our inherent running capabilities and shedding modern encumbrances, we could unlock profound health benefits.