Scientists discover when humans and dogs became friends

The relationship spans thousands of years, but experts might have pinpointed the first connection

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Dogs have been close four-legged friends of people as far back as we can remember, but exactly how long has this partnership been going? Scientists might finally know the answer, thanks to a new study on archaeological remains from Alaska. The research suggests the close relationship between humans and the ancestors of today's dogs began 12,000 years ago.