In April 2016, the US House of Representatives and the Senate passed a bill that would honor the country's largest land mammal, the American bison, as our national mammal. The bipartisan ...

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 ...