DNA analysis clearly states: The dog is man's oldest friend

Tests have found that the custom of dogs can be traced back in time for 11,000 years, until the end of the Ice Age.

This confirms that the dogs were domeded before any other known species, writes BBC, translates Periscope.

Our friends were popular throughout the northern hemisphere of time, and it only stopped in five different types.

Despite European dogs' expansion during the colonial era, the traces of these ancient indigenous people survive today in America, Asia, Africa, and the Ocean.

Research has thus filled up some gaps that exist in the history of our closest animals. /Periscope