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Are all dogs the same species?

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But among dogs, which are well known for their hybrid (or mongrel) varieties, different breeds can mate and have viable offspring, so they are all found under the umbrella of a single species, Canis familiaris. Dogs are highly unusual in their variation, from the Chihuahua to the Great Dane. read more

-- Z. Kornberg, Jerusalem Michael Bruford, a professor of biological sciences at Cardiff University in Wales, explains the thought process behind this seeming double standard. read more

Forget aliens, said Jack Tseng, a paleontologist at the American Museum of Natural History in New York. read more

Dogs are all Canidae. But they are not the same species. Domestic dogs are the direct descendent of wolves. Domestic dogs and wolves are cross fertile, meaning they can breed and the pups are also fertile. Foxes are canines, but they are not cross fertile with domestic dogs. read more

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