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Generally, the domestic dog may be the oldest domestic animal, since it is supposed to be domesticated by way of a person ten to 15 thousand years ago. The first continues to be of a domestic dog were discovered in Mesolithic sites in various places. It seems that the initial European breed was quite little and would, in general, be best in comparison to today’s guy. There is minimal animal species on the planet, within which there would be obvious variations in the exterior and the dogs. Some social people associate diversity with different ancestors. Many older authors, based on the diversity of today’s dog breeds, think that your dog was formed by crossing many associated species from the dog family. Among them were also the newbie of the theory of evolution Charles Darwin and the Austrian ethologist Konrad Lorenz, who figured the ancestor of the domestic canine had been a wolf and a jackal. Another, even more probable and, recently, a more and much more supported theory scientifically, speaks of the normal ancestor of a wolf and a domestic dog. In accordance with this concept, the current diversity of dogs is meant to be because of intensive, more or less planned selection and breeding, and sudden, unpredictable heritable genetic changes – mutations even. The full total result is the emergence of several different breeds of dogs, whose specimens differ in size, head and torso, color, length and high quality of the locks, and also in usefulness for various purposes lastly.