Pitcures Of A Womans Breast

The month of the dog: The dog

The dog , whose scientific name is Canis lupus familiaris is a domestic carnivorous mammal of the Canidae family, which is a subspecies of wolf (Canis lupus .) However, their diet has changed considerably due mainly to the close bond that exists with the man until the point where today it is usually fed as if it were an omnivore. Size or size, shape and coat is very different by race. It has a highly developed hearing and smell, the latter being the main sensory organ. In small breed can achieve a lifespan of about 20 years, with careful attention by the owner, otherwise your life is on average about 15 years.

Ancestry and history of domestication

In the XXI century, researchers have reached consensus on almost all of it is quite possible that dog domestication began more spontaneous adaptation of this to come to live with the man who by human will. This is because they live next to man has always been advantageous to the canine. A dog living in a community human, even in antiquity, able to feed with less effort than a wild, could live better and enjoy the warmth and human care.
The dog is a domestic subspecies of the wolf, according to the comparison of the genetic maps of both species. The oldest fossil evidence of a domesticated dog was found in 2008 at Goyet Cave in Belgium, corresponding to about 31,700 years and apparently associated with the Aurignacian culture.

Until then, the earliest evidence had been found in Russia, belonging to 14,000 years ago (Eliseevich). The man managed to tame individual wolves, or, more likely, they proved unable to prevent the wolves were introduced in their villages and there were puppies. The dog was a useful aid in the hunt and to defend the group and their home. Gradually, the man's tailored to your needs, creating different races for different tasks and environmental and geographic characteristics.
He quickly realized the fine senses of smell and hearing that he had the dog the smell is more powerful than the human (the olfactory area is 20 times thicker, and in the case of the German Shepherd an area 34 times larger and 40 times more olfactory cells) and their hearing is able to perceive sounds well below and above the human hearing range. This advantage to increase its usefulness for hunting and guard duties. Its use as a shepherd and protector of herds is much later, leaving couples to domestication and exploitation of other animals. Animal social customs, which coexists perfectly nested groups, adapted to living with humans.

dogs are prized for their help in hunting. The dogs buried in the cemetery of Svaerdborg Mesolithic in Denmark show that in ancient Europe were already a valuable company.
Dogs have always accompanied man in his process to the civilization, and their presence is tested in all cultures around the world and in the stage pre-Inca Peru, the Moche were using them as an aid in hunting and as pets at home. At the burial of the Lord of Sipan tombs found in the remains of a dog that probably was used in hunting, and that the skull was fully developed their molars. The skull and teeth of the domestic dog have shrunk relative to the wolf does not need to kill large prey. Also, from a meat diet to a waste consisting of food from humans, developed smaller brains that require fewer calories and less protein for growth and sustenance. The perception of the dog by the people has changed and varies across cultures, several American ethnic groups prior to 1492, as still happens in parts of Far East Asia, the dogs were used directly as food in parts of the Middle East the dog has been associated by its appearance with the jackals (in fact scientifically believed to development of genetics in the late twentieth century common dogs around the world were descended from jackals) and when animals primarily jackals scavenging dogs have also been considered impure in that area. Perhaps the only kind of dog that descended from the wolf Tierra del Fuego is the dog that descend from culpeo.

Source: Wikipedia