How did our ancestors survive the shift from trees to land? How did Homo sapiens evolve to dominate the planet? How did our ancestors hunt before they developed weapons? The answer, you'll be amazed to learn, is that humans became nature's perfect endurance runners... anthropologist and host Niobe Thompson takes us on a journey that weaves cutting-edge science with gripping adventure, and asks what today's runners can learn from our evolutionary past. Finally understand the science and sport of barefoot running.

Originally broadcast on CBC television program The nature of things on March 15, 2012. This DVD may not play in all DVD players.

Introduction -- Arctic Siberia -- Ethiopia -- Canada: death race.