Fossil DNA evidence suggests musk oxen were not only more geographically widespread during the Pleistocene, but also more genetically diverse. During that time, other populations of musk oxen lived across the Arctic, from the Ural Mountains to Greenland. Together with the bison and the pronghorn, the muskox was one of a few species of Pleistocene megafauna in North America to survive the Pleistocene/Holocene extinction event and live to the present day.