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This is Scientific American 60-Second Science.I'm Wayt Gibbs. Got a minute?

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We love our dogs, and they love us.

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But it hasn't always been that way.

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Dogs evolved from wolves.

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(sound)

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But when and where?

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Some have argued that humans domesticated wolves into dogs in Asia or the Middle East about 12,000 years ago, as the rise of agriculture allowed us to settle down.

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But the bones of ancient dogs, dug up from caves in Belgium and Siberia, tell a different story.

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A team of geneticists extracted DNA from those bones, as well as from 49 wolves and from 77 modern dogs of various breeds.

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By comparing the DNA from dogs and their ancestors, the scientists were able to reconstruct a family tree.

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The work appears in the journal Science.

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The geneticists conclude that dogs were probably domesticated in Europe,

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most likely between 19,000 and 30,000 years ago, when we humans were still hunting and gathering, and leaving carcasses and trash piles behind.

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Those wolves that overcame their natural fear of people might have had easy meals.

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And now we have a better idea of just who let the dogs in.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Wayt Gibbs.

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