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 ...

To survive in a tumultuous environment, sea urchins literally eat through stone, using their teeth to carve out nooks where the spiny creatures hide from predators and protect themselves from the ...

The spines of sea urchins make them look like pin cushions, but these marine invertebrates also have very sharp teeth that can dig into rock. Now researchers have discovered what makes the teeth so ...