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.
Early humans first migrated out of Africa into Asia probably between 2 million and 1.8 million years ago. They entered Europe somewhat later, between 1.5 million and 1 million years. Species of modern humans populated many parts of the world much later. For instance, people first came to Australia probably within the past 60,000 years and to the Americas within the past 30,000 years or so. The beginnings of agriculture and the rise of the first civilizations occurred within the past 12,000 years.