Join paleontologists Roger Smith and Neil Shubin as they trace the history of your teeth back to fearsome beasts that lived over 200 million years ago. You may not think there's much insight to be ...

Brush the outer surfaces, the inner surfaces, and the chewing surfaces of all your teeth. 5. Clean each section: Spend about 30 seconds on each quadrant of your mouth for a total of 2 minutes.

Inside our mouths live more than 700 species ... which over time can pull essential minerals from your teeth and lead to cavities. If you’re not vigilant about cleaning, bacteria can also ...