In the film "10,000 BC," a band of hunters venture on an epic quest, overcoming prehistoric monsters to end up at a land of gods and pyramids. The fantastic creatures depicted in the movie — from the giant carnivorous birds to saber-toothed cats and woolly mammoths — actually once existed. The most famous of the saber-toothed cats was Smilodon, a group of predators often dubbed saber-toothed tigers, although they were not actually close relatives of the modern tiger. Ironically, Smilodon was recently found to have had a relatively weak bite.