Narrator: Lions have them, hippos have them, and even you and I have them: canines, those long, pointy front teeth. They're actually the longest teeth in the human mouth. So what are these long, sharp ...

Piranhas belong to a family of bony fish characterized by highly developed dentition. They’re cousins to the pacu fish, which has dentition eerily similar to human teeth. Unlike pacu teeth, which are ...

The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in "Jurassic Park." But new research suggests that this classic image might be wrong. The teeth on T. rex ...

When most people think of ferocious, blade-like teeth on prehistoric creatures they picture Smilodon, better known as the saber-toothed tiger. But in the world of dinosaurs, theropods are well known ...

T. rex teeth — possibly up to six inches long — were thought by many to be too big not to protrude. In recent years, paleontologists have debunked other stereotypical portrayals of the dinosaur. Some ...

Two warm-blooded mammal species have triumphed in the fast-paced environment of New York City: human beings and rats. Robert Sullivan was fascinated with how eager many people are to save whales or ...

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 ...

About 25 million years ago, the warm, shallow seas off the southern coast of Australia were home to a bountiful scene of ocean-dwelling creatures. “In these seas, there was this extraordinary ...

The average ant tooth is thinner than a human hair and able to slice through tough leaves and even flesh without breaking. Researchers now know how: the edges of ant teeth are lined with a layer of ...