They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers that could measure nearly one foot long. But behind the fearsome ...

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 ...

Although commonly referred to as the “saber-toothed tiger,” Smilodon was not closely related to modern tigers or any big cats we are familiar with today. Instead, Smilodon belonged to a distinct ...