(Via Pharyngula: http://scienceblogs.com/pharyngula/)
From the National Geographic Site: http://news.nationalgeographic.com/news/2008/08/080814-sereno-sahara-missions.html
Paleontologist Paul Sereno and his team were scouring the rocks between harsh dunefields in northern Niger for dinosaur bones in 2000 when they stumbled across the graveyard, on the shores of a long-gone lake.
Perhaps most incredible was the 2006 discovery the Stone Age Embrace—a Tenerian woman facing the remains of two young children, their arms posed and hands interlaced. Pollen remnants from underneath the skeletons shows the dead had been laid on a bed of flowers. "This is a landmark burial—there's nothing like it in prehistory," Sereno said.
The scientists eventually uncovered 200 burials of two vastly different cultures that span five thousand years—the first time such a site has been found at a single site.
Called Gobero, the area is a uniquely preserved record of human habitation and burials from the Kiffian (7700 to 6200 B.C.) and the Tenerian (5200 to 2500 B.C.) cultures, says a new study led by Sereno of the University of Chicago.
The "watershed" find also offers a new window into how these tribes lived and buried their dead during the extreme Holocene period, when a grassy Sahara dried up in the world's largest desert.
Very cool stuff. Please go read the whole thing... or buy the September issue of National Geographic.