Some were the size of a dog. Others were as large as polar bears. A newly-discovered fossil of the ferocious hyaenodont is ...

Incisors help you bite off and chew pieces of food.

And others naturally have extra teeth, known as hyperdontia. Our different types of teeth help us cut, tear, mash, and grind our food, making it easier to swallow. Here’s what you need to know ...