Paleontologist Paul Sereno is known for digging up dinosaur fossils. Twelve years ago, however, while tracking dinosaur remains in the Sahara desert, his team stumbled upon human bones -- a lot of them. Sereno couldn’t walk away from the discovery.
The Green Sahara desert in northern Niger is one of the harshest, most desolate places on earth. The region’s abundance of fossils, however, makes it a destination for scientists.
