Brush, floss, and forget: chances are, you only think about your teeth when they cause you trouble. But teeth have tales to tell, such as how old we are, how fast we grew, and how far we’ve traveled…

But, most intriguingly, teeth can tell us both what we evolved to eat and what we actually have been eating.

Paleo diet fans insist that our modern teeth troubles—all those pesky cavities—come from eating the wrong diet. If we only ate what our ancestors ate—meat, berries, and no grains—we’d be fine, they claim. But what do our teeth say?

Tune in this episode to find out the toothy truth.