The Africa of two million years ago is a crossroads in human evolution. Half a dozen or more different species of ape-men exist alongside one another. Each of them has ********* the environment in a different way and has developed their own survival strategy .
One and a half million years ago, a new breed of ape-man walks the land. In southern Africa, Homo ergaster has taken the next step to becoming human. They have long, modern looking noses, which cool air as they breathe.
