We’ve been doing it for two million years and it is still quite challenging. Actually, not only challenging but one of the challenges in the summer olympics, starting next week in London. Running. The simplest thing in the world? Or rather an olympic discipline and personal achievement? Is it really just right, left, right, left? As babies we first struggle to crawl, then to lift our bodies up to stand on our little feet and then even walk on these feet. Left, right, left, definitely wasn’t that easy back then. But Christopher McDougall talks about the perfection of walking, running marathons. He 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?