Spencer Wells
National Geographic Society
The Journey of Man: A Genetic Odyssey

Evidence from paleoanthropology and genetics has consistently shown that our species originated in Africa.  Recent results from the Y-chromosome confirm this, but further posit that all modern humans were still living in Africa 60,000 years ago.  The case for a recent �African exodus� will be discussed, with supporting evidence drawn from DNA polymorphisms, paleoclimatology and archaeology.