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The Boston Globe

Science

The evolution of man’s best friend

Scientists debate the origin of dogs

Where did dogs come from? That simple question is the subject of a scientific debate right now. In May, a team of scientists published a study pointing to East Asia as the place where dogs evolved from wolves. Now, another group of researchers has announced that dogs evolved several thousand miles to the west, in Europe.

This controversy illuminates the challenges that scientists face as they excavate the history of any species from its DNA.

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