Pleistocene Wolf Skulls (IMAGE) Smithsonian Caption Photographs of Pleistocene wolf skulls from Rancho La Brea, California (above) and Alaska (middle). Bottom panel shows overlay of the outlines of the two skulls illustrating that although they are the same length, their shape is different-the wolf skull from Alaska is wider, and therefore those wolves had greater biting power. Credit Blaire Van Valkenburgh, University of California, Los Angeles Usage Restrictions None. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.