Our oldest ancestors

"DNA studies have confirmed this opening chapter of our story over and over: All the variously shaped and shaded people of Earth trace their ancestry to African hunter-gatherers (Kalahari Bushmen)....Perhaps the most wonderful of the stories hidden in our genes is that, when unraveled, the tangled knot of our global diversity today leads us all back to a recent yesterday, together in Africa." The Greatest Journey, by James Shreve (National Geographic, Mar 2006)