The first original humans, Homo sapiens, were Black Africans, and they evolved around a quarter of a million years ago in North East Africa from Homo erectus. These original humans were little different to the Black African, nomadic racial tribes that inhabit the North East Africa region today. The environment there has not changed at all since that time, and thus neither have they. A tribe of these Black Africans migrated out of North East Africa around one hundred and thirty thousand years ago. This origin and migration theory is often referred to as the Out of Africa Theory.