What was the dog domesticated from?

Mexican hairless dog (rare breed)

There is also a crested dog in China, which can be divided into two types, one is the flapping type (the whole body hair is very long) and the other is the hairless type, with only the hair below the first joint of the head and legs and the tail.

dog

Dog (Latin scientific name: Canis lupus familiaris；; English name: dog), also known as "dog", the scientific name is "domestic dog". It is also called "six animals" with horses, cows, sheep, pigs and chickens. Some scientists believe that dogs were domesticated by early humans from gray wolves. The domestication time was from 40,000 years ago to 1.5 million years ago, and it has developed to this day. Known as "the most loyal friend of mankind", it is the pet with the highest feeding rate at present. Its life span is about ten years.

Nurse dog: guarding human safety and property, guarding homes and nursing homes.

Pet dog: companionship and enjoyment.

Hunting dogs? Hunting expenses ...

Pastoral dogs: sheepdog, cattle dog. ...

Medical dogs: due to their optimistic nature, dogs are suitable for caring for and accompanying patients with mental illness, depression and autism (except violent patients); The premise is to choose a domesticated dog that won't make trouble, otherwise it may increase the burden and lead to a worse condition.

Dog care: take care of people who have difficulties in self-care and paralyzed people; Can help people take off their shoes/socks, insert cards to withdraw money, open/close doors, turn on/off lights, push/pull cars, and take things from the refrigerator.

Guide dog: Compared with guard dogs, it is more responsible to accompany its owner at all times, and most of the things of the owner really need the assistance of guide dogs; Guide the owner to cross the road, and the dog will go shopping alone.

Canine ancestors

No one knows exactly when the first interaction between man and wolf took place. Some scientists think it may be 50,000 years ago, because it took at least so long for wolves to develop today? Genetic differences. At that time, humans and wolves were distributed in many places on the earth's surface, and the evolution process may have occurred in several different areas. Some scholars believe that wolves were domesticated from wild wolves to domestic animals for playing, hunting and housekeeping, that is, dogs, before 14000 years or even before 16000 years in Southeast Asia.

Dogs originated from wolves and have been recognized, but opinions vary around the specific place of birth and time. The earliest evidence of dog fossils comes from a mandible fossil in Germany 14000 years ago. These archaeological evidences support that dogs originated from? In southwest Asia or Europe, on the other hand, the characteristics of dog's bone identification suggest that dogs may have originated from wolves, thus putting forward the theory of the origin of East Asian dogs. In addition, different breeds of dogs are very diverse in morphology, which seems to be inclined to the hypothesis that dogs originated from wolves of different geographical groups. Archaeology alone can hardly provide reliable clues about the origin of dogs.

Domestication process

America? Researchers at the University of Arizona unearthed two dog skulls at least 33,000 years ago from Belgium and Siberia, respectively, indicating that dogs have been tamed by humans as early as ancient times.

The researchers said that these two dogs have short noses and wide chins, while wild animals like wolves need long noses and narrow chins to catch their prey. On this basis, they think that this shows that our ancestors began to domesticate dogs long ago to resist danger and relieve loneliness. The researchers also believe that dogs may be the first animal domesticated by humans, which is much earlier than domestic animals.