For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...

following the giant ice shelf that covered the northern Atlantic during the ice age 20,000 years ago. In prehistoric North America, the short-faced bear (Arctodus simus) ruled the land.

“Carnivores would be cool. “One of my favourite extinct species is a thing called Arctodus, the giant short-faced bear, which ...