&433/ Watch to Be Inspired: Building a Family Tree

Citing TED.com:

• The talk. "All humans share some common bits of DNA, passed down to us from our African ancestors. Geneticist Spencer Wells talks about how his Genographic Project will use this shared DNA to figure out how we are - in all our diversity - truly connected."
• The speaker. "By analyzing DNA from people in all regions of the world, Spencer Wells has concluded that all humans alive today are descended from a single man who lived in Africa around 60,000 to 90,000 years ago."

TED Arusha 2007, Spencer Wells. View the talk!