A 33,000-year-old skull of a "wolf on the way to becoming a dog" was found in a Siberian cave. Evolutionary Biologist Susan Crockford, co-author of a study about the skull in PLoS ONE, discusses why the discovery challenges common beliefs about dog domestication.
Source: http://www.npr.org/2012/01/27/145990105/ancient-skull-holds-clues-to-dog-domestication?ft=1&f=1007
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