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In honor of National Dog Day, ABC News looked back at how our furry four-legged companions evolved from feral wolves into our best friends.It was originally believed the first domesticated wolves appeared around 15,000 years ago in the Middle East. New evidence, however, suggests it was much earlier than that. Swedish geneticist Pontus Skoglund published a study last year in the journal Current Biology, describing his findings of a 35,000-year-old Siberian wolf bone. He concluded that canine domestication may have first occurred 27,000 to 40,000 years ago.According to genetic studies, modern day domesticated dogs originated in China, the Middle East and Eastern Europe. According to Greger Larson, an archeologist and geneticist, gray wolves were domesticated by humans somewhere in western Eurasia. He surmises people in the East were also domesticating wolves at the same time.
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Scientists believe wolves were first attracted to human camps to scavenge for leftover food. Over time, some wolves started traveling with the nomadic humans and a sort of natural selection for domestication occurred, Dr. Stephen L. Zawistowski, science adviser emeritus to the American Society for the Prevention of Cruelty to Animals (ASPCA), told ABC News. Women may have been the first to make these wolves a pet, according to Katherine M. Rogers, professor emerita of English from Brooklyn College, in her book “First Friend.” It takes six to eight generations to domesticate a canine, according to a 40-year experiment that began in the late 1950s by Russian researcher Dmitri K. Belyaev.