A baby was born with a second mouth that had a working tongue and teeth, according to a May case report. Typically the condition, which is called facial duplication, is the result of an underlying ...

A newly discovered 310-million-year-old fossilised fish is the earliest known example of one with extra teeth deep inside its mouth. The ray-finned fish found in Staffordshire evolved a "unique" way ...

We have two sets of teeth during our lifetime. These are primary (baby) teeth and adult teeth. People typically have 20 primary teeth and 32 adult teeth. It’s also possible to have an extra, or ...

Fossils over 300 million years old reveal the evolution of a tongue bite in an ancient group of deep-bodied ray-finned fishes, such as Platysomus parvulus. Experts have uncovered the earliest known ...

Dear Dr. Roach: What causes the growth of new teeth at my current age? I am a 74-year-old woman in good medical health except for a transient ischemic attack (TIA). Generally, I feel well and keep ...