A system of opposing genetic forces determines why mammals develop a single row of teeth, while sharks sport several, according to a study published today in the journal Science. When completely ...

Even before birth, however, the permanent change of teeth begins and the newly formed teeth show the first primary serrations. "This means that the first teeth are even changed in the womb -- and ...

You probably don’t think much about teeth until a dentist brings them up. But across the animal kingdom, tooth counts can get wild fast. Some sharks go through thousands in a lifetime. Slugs carry ...

It affects a significant number of children and can leave their adult teeth permanently weakened and discoloured. Sorapop ...