What does MPI stand for? MPI stands for Major Periodic Inspection (aviation industry) Suggest new definition This definition appears somewhat frequently and is found in the following Acronym Finder categories:
Scientists agree that our early ancestors, Homo erectus, first appeared in Africa 1â2 million years ago. They spread throughout the world and evolved into ancient humans. Most believe that modern humans evolved in Africa, and gradually replaced all the other ancient humans (the 'Out-of-Africa' theory). Some scientists believe that ancient humans may have evolved into modern humans all over the world at around the same time (the 'multiregional' theory). Either way, by about 30,000 years ago, we â Homo sapiens â were the only humans left on the planet. The 'multiregional' and 'Out-of-Africa' theories.
Other scientists have argued that human beings originated in Africa before moving to other regions 150,000 to 200,000 years ago. Homo sapiens discovered in Middle Awash, Ethiopia, from 160,000 years ago were believed to be the oldest 'modern' human beings.Other remains previously found in Israeli caves are thought to have been more recent and 80,000 to 100,000 years old.he findings of Professor Avi Gopher and Dr Ran Barkai of the Institute of Archeology at Tel Aviv University, published last week in the American Journal of Physical Anthropology, suggest that modern man did not originate in Africa as previously believed, but in the Middle East.