A genetic survey concludes that all Europeans living today are related to the same set of ancestors who lived 1,000 years ago. And you wouldn't have to go back much further to find that everyone in the world is related to each other.

"We find it remarkable because it's counterintuitive to us," Graham Coop, an evolutionary biologist at the University of California at Davis, told NBC News. "But it's not totally unexpected, based on genetic analysis."

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