By Ben Hirschler LONDON (Reuters) – Ancient humans made dogs their best friend not once but twice, by domesticating two separate populations of wolves thousands of miles apart in Europe and Asia. It was widely believed dogs were tamed just once, with some experts claiming this happened in Europe and others favoring central Asia or China. "Our data suggests that dogs were domesticated twice, on both sides of the Old World," said Laurent Frantz, a geneticist at the University of Oxford, whose work was published in the journal Science.
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