by 
Leah
ANSWERS: 2
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No one has any idea since no one alive was there when it happened. OH, and the answer is more than 1.5 million years ago.
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anatomically modern humans date back to about 200,000 years ago. the single successful migration out of africa (there were unsuccessful ones, also) happened about 70,000 years ago. so modern humans were bopping around for about 130,000 before the rest of the world's ancestors made a break for it.
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