Information about the Ancient Bison: The Ancient Bison is an extinct mammal that was native to the North American continent. It was one of the most widespread of the herbivores and is the most common member of the order mammalia found at the noted La Brea Tar Pits in southern California. During the late Pleistocene era (240,000 and 220,000 years ago) the species Bison priscus migrated from Siberia and to Alaska, and eventually was replaced in mid North America by Bison latifrons. Antique bison branched out and existed until around ten thousand years ago. The modern Bison came from this species. Larger than the modern bison by 15-20 percent, the antique bison had horns that could reach a length of up to three feet. There has been much speculation as to why this species went extinct, although recent theories point to climate change as one of the major causes. Buy a Digital Download