The ancestor of dogs is wolves. Dogs are derived from wolves after more than 10,000 years of breeding and domestication. Although they have been domesticated and raised for a long time, dogs still retain the habits of primitive wolves in their nature.

Nowadays, some dogs still retain the habits of wolves, such as leaving their own scent to mark territories, bury food, etc. However, they have been tamed by humans and have become very docile and very loyal to people. , and some breeds are not aggressive.

After analyzing the DNA of hundreds of dogs from Europe, Asia, Africa and North America, scientists found that the genes of all dogs in the world have similar gene sequences, so they concluded , all domestic dogs in the world evolved from East Asian wolves about 15,000 years ago. The ancestors of these dogs traveled through Asia and Europe to America through the Bering Strait with the earliest settlers in America.

Scientists from Sweden and China studied the genes of 654 dogs and found that the genes of East Asian dogs are highly diverse, which shows that East Asians were the first to tame wolves into dogs.