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DNA from a man who lived in Ethiopia about 4,500 years ago is prompting scientists to rethink the history of human migration in Africa.
Until now, the conventional wisdom had been that the first groups of modern humans left Africa roughly 70,000 years ago, stopping in the Middle East en route to Europe, Asia and beyond.
Then about 3,000 years ago, a group of farmers from the Middle East and present-day Turkey came back to the Horn of Africa (probably bringing crops like wheat, barley and lentils with them).
Population geneticists pieced this story together by comparing the DNA of distinct groups of people alive today.
For men, male decoration is simpler with the exception of their facial painting which denote status and progression up the social ladder.In 1921, archaeologists exploring an ancient burial mound near Egtved, a village in Denmark, unearthed the grave of a girl estimated to have been 16 to 18 years old when she died.Not much remained of her body — only some hair, teeth, nails, and bits of skin and brain — but scholars could tell...Since humans emerged in Africa, DNA from an ancient Africa could provide a valuable genetic baseline that would make it easier for scientists to track genome changes over time.See the most-read Science stories this hour Unfortunately, such DNA has been hard to come by. The samples of ancient DNA that have been sequenced to date were extracted from bodies in Europe and Asia that were naturally refrigerated in cooler climates.