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Shungura Formation around Omo in Ethiopia, which are dated to the Early Pleistocene, around 2.44-2.27 million years ago.' Another possible early record is from the Kanjera site in Kenya, dating to the Middle Pleistocene, around 500,000 years ago. Genetic analysis suggests a major population expansion between 500,000 and 100,000 years ago. Records become more common during the Late Pleistocene,

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