... evolution of homo-erectus to homo-sapiens in Africa, the modern humans migrated out to all other parts of the world with some leaving behind to live. These modern human populations took over the regions that they migrated to from the local populations of homo-erectus which were more or less extinct by that time. Of the two evolution models above, there are reasons probably to favor the replacement model over the multi-regional model. Why the replacement model? Firstly, one reason would be that the earliest bones and fossils of modern humans were found in Africa. These fossils are believed to be around 130,000 years ago. It might the time around which the first modern humans appeared. They represent the oldest fossils of modern humans to be found, much older to other fossils or bones found in any other parts of the world. The study of genetic structure of modern human populations also suggests that ...

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