They are not just man's best friend, but dogs are the oldest pals too, says a new study. In their study, a team at Arizona University claims that dogs have been man's best friend for at least 30,000 years - in fact, the canines were domesticated before any other animal. Researchers have based their findings on an analysis of two skulls unearthed in separate digs - first an ancient dog skull found in Siberia, dating back 33,000 years, and then a similar find in Belgium.
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