extreme running

tags: Antarctica, South Pole, endurance training, extreme running, Ray Zahab, streaming video In this video, extreme runner Ray Zahab shares an enthusiastic account of his record-breaking trek on foot to the South Pole -- a 33-day sprint through the snow. [5:54] TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas…