One dominant idea among evolutionary biologists is that Homo sapiens left Africa about 60 or 70 thousand years ago, spreading across the world from there. It's called the "out of Africa" theory. But now, more evidence is challenging it.
Over on New Scientist, Catherine Brahic offers a cogent summary of the new evidence. Some comes from Asia, where scientists have discovered teeth that may be Homo sapiens dating from before 70 thousand years ago, and possibly from as long ago as 125 thousand. There are also fragments of early human skulls from Israel, which may date to as early as 150 thousand years ago.
What's emerging from this fragmentary evidence — which is still far from widely accepted — is a more complicated picture of when early humans left Africa, and where they went. Writes Brahic:
Over on New Scientist, Catherine Brahic offers a cogent summary of the new evidence. Some comes from Asia, where scientists have discovered teeth that may be Homo sapiens dating from before 70 thousand years ago, and possibly from as long ago as 125 thousand. There are also fragments of early human skulls from Israel, which may date to as early as 150 thousand years ago.
What's emerging from this fragmentary evidence — which is still far from widely accepted — is a more complicated picture of when early humans left Africa, and where they went. Writes Brahic:
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