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

A new study reveals why: these teeth were 'functionally optimal' and highly effective at puncturing prey. Sabre-toothed predators -- best know from the infamous Smilodon - evolved multiple times ...

These long, blade-like canines seem almost perfectly optimized to kill prey. They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers ...

Our results reveal that the extreme sabre-toothed forms, like Smilodon, were optimised for puncturing prey with minimal force. However, they were more prone to breakage under high stress.

These long, blade-like canines seem almost perfectly optimized to kill prey. They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated ...