Skeletons of the Sahara

Like many great scientific discoveries, this one happens by accident. Sereno, an expert in locating dinosaur fossils, is on an expedition to Niger, in Saharan Africa. Six weeks into a three-month journey, his team makes an unexpected discovery: human bones, the remains of peoples who lived 10,000 and 5,000 years ago.

• David MurdockDirector

• Paul SerenoSelf