Christopher McDougall: 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? 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.
Lewis Pugh: My mind-shifting Everest swim
After he swam the North Pole, Lewis Pugh vowed never to take another cold-water dip. Then he heard of Lake Imja in the Himalayas, created by recent glacial melting, and Lake Pumori, a body of water at an altitude of 5300 m on Everest — and so began a journey that would teach him a radical new way to approach swimming and think about climate change.