This Spencer Wells documentary on PBS is the best thing on television I have ever seen. Bar NONE. It totally moved me and made me realize how we are all connected on this planet. This documentary uses genetic data to trace human ancestors, and their trek to Central Asia, India, Australia, and Europe... This is the most fascinating documentary ever. Basically, we are all of African ancestry, and Europeans, Asians, and Americans can trace their lineage back to a group of humans in Central Asia.