Wild New World - Season 1 Episode 4 Edge Of The Ice

The vast seas of grass on the Great Plains are home to bison, coyotes and prairie dogs today. But previously the area was an American Serengeti, populated by Columbian mammoths (the largest of all mammoths). Here cheetah hunted pronghorn antelope and lions stalked horses and bison. But the most impressive of all the carnivores was the giant short-faced bear.