PBS - Journey Of Man (2005) Part 2

Where did we come from? Spencer Wells, a 33-year-old population geneticist, has closed the door on his laboratory and is embarking on the biggest adventure of his life. His mission: to retrace the most extraordinary journey of all time, a journey that involves every man, woman and child alive today. He offers his thoughts on this puzzling question, employing the latest in DNA research and technology to track the migration of humanity across the globe. By collecting blood samples from thousands of men living in isolated tribes around the world and analyzing their DNA, Spencer and his colleagues discovered that all humans alive today can be traced back to a small tribe of hunter-gatherers who lived in Africa 60,000 years ago. Following this genetic trail, Spencer has charted the ancient journey of our ancestors as they populated the planet, continent by continent.