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 ...

Tens of million years ago, sand tiger sharks hunted in the waters off the Antarctic Peninsula, gliding over a thriving marine ecosystem on the seafloor below. All that remains of them today is their ...

Tens of million years ago, sand tiger sharks hunted in the waters off the Antarctic Peninsula, gliding over a thriving marine ecosystem on the seafloor below. All that remains of them today is their ...

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 ...

Ancient marine animals called conodonts possessed incredibly sharp feeding elements. New research shows these extinct ...

If there is one place you don’t want to stick your finger, it’s the mouth of a Pacific lingcod. These fearsome fish, which can grow up to 5 feet in length and weigh 80 pounds, have around 500 ...

The fossil skeleton of a bird with strange teeth that lived 125 million years ago has been discovered in China. The bird had bizarre ridges on its teeth that may have enabled it to crack open ...

Video by @zookeeperguyHippos have four canines one in each corner in the front of their mouth. But if you look along here, you can see that they’re not the same. The big lower canines, those is the ...

A "killer walrus" thought to have terrorized the North Pacific 15 million years ago may not have been such a savvy slayer after all, researchers say. A new analysis of fossil evidence of the ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Sora Kim, University of California, Merced (THE CONVERSATION) Tens of million years ...