Domesticated Dogs
Published on Nov 19, 2015
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THEORIES
Some experts believe our ancestors in the Middle East and elsewhere were naturally drawn to small, furry wolf pups and took them as novelties. Others suggest they were raised as a source of meat in early agricultural societies in Asia.
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Yet another theory holds that early dogs were used as helpers by bands of hunters. This was long before humankind ever began domesticating goats and sheep, the first species believed to be bred for agriculture.
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According to a study, dog domestication most likely occurred in Ice Age Europe 18,800 to 32,100 years ago.
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The biologists discovered this after analyzing the mitochondrial DNA of 18 ancient dogs and wolves and comparing them with the mitochondrial DNA of modern canines. Mitochondria are tiny structures inside a cell that produce energy for it.
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The study's authors wrote that dogs evolved from a now extinct species of European wolf. This wolf, which died out long ago, followed bands of humans who were hunting woolly mammoths and other large prey.
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Until recently, many archaeologists and biologists believed that dogs were first domesticated no more than 13,000 years ago, either in East Asia or the Middle East. One key find was a burial site in Israel. It contained the 12,000-year-old remains of an elderly man cradling a puppy, evidence of the unique bond between dogs and humans.
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Charles Darwin, who died in 1882, believed that the dizzying variety of dog breeds meant that dogs must have had more than one wild ancestor. Genetic researchers today say this is most likely not the case and that domesticated dogs evolved from one ancestor, in one region.
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Citation:
www.newsela.com
"Domesticated dogs descended from an Ice Age European wolf, study says"
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