Bok
02-19-2012, 12:43 AM
Temperature changes off the coast dried out East Africa 2 million years ago
More... (http://www.sciencenews.org/view/generic/id/338562/title/Oceans_set_stage_for_human_evolution)
More... (http://www.sciencenews.org/view/generic/id/338562/title/Oceans_set_stage_for_human_evolution)