Old dog, new tricks: Study IDs 9,400-year-old mutt

Researcher Samuel Belknap III poses with a skull of a domestic dog, Friday, Jan. 14, 2011, at the University of Maine in Orono. Belknap found a bone fragment of what he says is the oldest-known domesticated dog in North America, while examining a waste matter recovered from Hinds Cave, a major archeological site in southwest Texas near the Mexico border. A carbon-dating test pegged the age of the bone at 9,400 years old. (AP Photo/Robert F. Bukaty)

January 19, 2011 5:48:59 AM PST
Nearly 10,000 years ago, man's best friend provided protection and companionship - and an occasional meal.

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