If you’ve seen “Ice Age,” you probably know about some of the ancient mammals that no longer grace this world. Some were massive, and others have modern cousins they slightly resemble. Many had weird traits or looks to them that make scientists look back and wonder, how did that happen? One such animal is the saber-toothed cat, which isn’t just one species. How did this feline evolve knives in its mouth?
Watch next video This man lives alone on an island paradise