Origin of the domestic dog that was the most divergent group. The study found that the skulls of the "Goyet dog" and the "Altai dog" had some dog-like characteristics and proposed that the may have represented an aborted domestication episode. If so, there may have been originally more than one ancient domestication event for dogs as there was for domestic pigs. One theory is that domestication occurred during one of the five cold Heinrich events that occurred after the arrival of humans in West Europe 37 000, 29 000, 23 000, 16 500 and 12 000 YBP. The theory is that the extreme cold during
Origin of the domestic dog have diverged from their ancestor at a later time. Immediately after divergence, the dog population outnumbered the wolf population, and later the dog population underwent a population reduction to be much lower than that of the wolf. In 2017, a study compared the nuclear genome sequences of three Neolithic dog specimens from Germany and Ireland with sequences from over 5,000 dogs and wolves. The study found that modern European dogs descended from their Neolithic ancestors with no evidence of a population turnover found by an earlier study. The study found that a single dog-wolf divergence occurred 36,900-41,500 YBP, followed by