Seven per cent of pet dogs – mostly small, “toy” breeds – have doubled-up teeth, reminiscent of sharks’ mouths. The condition, known as persistent deciduous teeth, occurs when the dog’s baby teeth ...

We adopted our Pug mix as a rescue from Puerto Rico. He was one of many dogs saved after Hurricane Maria. When we first brought him home in 2018, we noticed a few unique qualities about our new ...

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 ...

When it comes to scary teeth, piranhas’ bite is among the most fearsome. Their razor-sharp teeth strip prey’s flesh with the ease of a butcher’s knife. In a process that avoids dulling, the fish lose ...