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 ...

Children’s first teeth form while they are still in the uterus, but it usually takes time for those teeth to come in and emerge from their gums. But which teeth come in first? The set of teeth that ...

A 4-month-old infant in Maryland may be the first person to have had teeth form in his brain as a result of a specific type of rare brain tumor, according to a new report of the case. The boy is doing ...

After a child's milk teeth have fallen out, which occurs between 6 and 12 years of age, the adult teeth begin to erupt. The emergence of these permanent teeth usually overlaps with the shedding of the ...

Anyone who has had their wisdom teeth removed knows that they’re a real pain in the … mouth. Now, a study detailed in the Sept. 27 issue of the journal Nature finds these annoying teeth may only exist ...

Piranha fish are incredible animals that have gotten a bit of a bad reputation over the years. Though relatively small, the fish sport jaws lined with incredibly sharp teeth that they can use to tear ...

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