human
Is there a way to tell how old a person is by looking at their teeth?
assistant
Yes, it is possible to tell how old a person is by looking at their teeth. Teeth are made up of layers of enamel and dentin that get thicker as we age. As we age, the outer layer of enamel gets worn away, exposing the underlying dentin. So if you can see the dentin in someone's tooth, they are likely older than if you cannot see any dentin.