Dog - Wikipedia
The dog or domestic dog (Canis familiaris) is a domesticated descendant of the grey wolf. It has many notable characteristics, the most prominent of which is the upturning tail. The dog derived from an ancient, extinct wolf. Today, the modern grey wolf is the dog's nearest living relative. Experts assert that the dog was the first species to be domesticated. It is believed that domestication took place over 15,000 years ago and was performed by hunter–gatherers before the development of agriculture.
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