Scientists know that some saber-toothed cats had front teeth up to 7 inches long. They know these cats hunted mammoths and mastodons. But how could the cats bring down such giant animals? Did they prowl alone like cheetahs or live in groups like lions? How do you learn about an animal that has been extinct for over 10,000 years? Learn to think like a scientist and solve the mystery of this fierce, fearsome predator.