Why Did Early Humans Migrate Out Of Africa
Camila Farah
Most likely a change in climate helped to push them out.
A climate shift and greening in the middle east probably helped to draw the first humans out of africa. However an alternate theory proposes that hominins migrated out of africa before homo ergaster evolved possibly about 2 million years ago prior to the earliest dates of homo erectus in asia. It s better to view the movements of early humans as dispersal or a spreading out. These hominins may have been either australopithicines or more likely an unknown species of homo similar in appearance to homo habilis.
Experts suggest that droughts in africa led to starvation and humans were driven to near extinction before they ever had a chance to explore the world. And while louise leakey and her family proved that through prehistoric bones and fossils spencer wells looks for the evidence of our common origins in living breathing human beings. The development of genetic analysis tools in the 1980s helped scientists grow attracted to the out of africa hypothesis. Migration implies a directional movement toward or away from a specific area.
About spencer wells humans have remarkably little genetic variation for a species of large apes. Out of africa was only established in the 90 s during a debate as to the age of modern humans. But according to one prominent theory that expansion fizzled out and our ancestors didn t actually leave africa in large numbers until about 60 000 or 70 000 years ago. Geneticist spencer wells tells the story of early humans and our eventual migration from africa.
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Researchers of human evolution awoke to exciting and provocative news from the journal nature on wednesday.
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