Photo: Modern Humans Came Out of Africa, "Definitive" Study Says

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By comparing the skulls and DNA of human species from around the world—including these Australian and African skulls—researchers assert that modern-day humans do indeed have a single origin in Africa.

The roots and dispersal of modern humans have sustained debate for decades, with some researchers arguing that Homo sapiens arose independently in other parts of the world.

Photographs courtesy Tsunehiko Hanihara

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