Learn how a variety of tooth shapes drove evolution across multiple kinds of mammals.

But evolution doesn't always come with a silver ... Narrator: Millions of years ago, wisdom teeth were dead useful. Those hefty molars helped us grind up fibrous veggies. Then, around 1 million ...

Another interesting result of this rapid evolution is the disappearance of wisdom teeth. According to Lucas, changes in our diets are causing our faces to be shorter and our jaws to be smaller.