33,000-year-old tooth shows links to dogs

Dogs were already domesticated by the advent of agriculture, 10,000 years ago, but scientists still don't know how far back the history goes or just when and where the modern species we know as dogs became distinct from wild wolves.

Some studies suggest that split happened more than 100,000 years ago, but the earliest known fossils from modern canines are just 36,000 years old.

A new DNA analysis of the tooth, found in southern Siberia's Altai mountains, shows closer links to modern dogs than to wolves.

The research confirms that the tooth belonged to one of the oldest known ancestor's of modern dogs.

“These results suggest a more ancient history of the dog outside the Middle East or East Asia, previously thought to be the centers where dogs originated,” the researchers said in a statement.

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