This is Grant Zazula of the Yukon Paleontology Program with the skull of a Pleistocene steppe bison. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted ...
Steppe mammoths were an ancestor of the woolly ... one from a small mammoth and one much larger. Half a bison skull was found complete with horn, and a bison rib bone attached to a vertebra.