A dog's skull, which had lain in a Siberian cave for 33,000 years, presents the oldest evidence of domestication of the canine.
The latest find comes after a dog's skull was found in Belgium and shows that man's best friends may have originated from more than one ancient ancestor, contrary to what some DNA evidence previously has indicated.
"Both the Belgian find and the Siberian find are domesticated species based on morphological characteristics," said Greg Hodgins, researcher at the University of Arizona's Accelerator Mass Spectrometry Lab and study co-author.
"Essentially, wolves have long thin snouts and their teeth are not crowded, and domestication results in this shortening of the snout and widening of the jaws and crowding of the teeth," said Hodgins, according to an Arizona statement.
The skull found in the Altai mountain is extraordinarily well preserved, said H
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