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Big freeze drove early humans out of Europe, scientists reveal - BBC News [View all]
A big freeze previously unknown to science drove early humans from Europe for 200,000 years, but they adapted and returned, new research shows.
Ocean sediments from 1.1 million years ago show temperatures suddenly dropped more than 5C, scientists said.
They said our early ancestors couldn't have survived as they didn't have heating or warm clothes.
Until now, the consensus had been that humans had existed in Europe continuously for 1.5 million years.
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