Human evolution
Homo sapiens has lived from about 300,000 years ago to the present. Between 400,000 years ago and the second warm period in the Middle Pleistocene, about 250,000 years ago, the human skull grew more like its present shape. Our species developed more sophisticated technologies based on stone tools. One possibility is that a transition between H. erectus to H. sapiens occurred. The evidence of Java Man suggests there was an initial migration of H. erectus out of Africa. Then, much later, a further development of H. sapiens from H. erectus in Africa. Then a subsequent migration within and out of Africa eventually replaced the earlier H. erectus.