Researchers say the tenaculum helps males grasp females during reproduction, acting like the mouth full of teeth that other ...

Scientists studied how the sea creatures, also known as chimaeras or ghost sharks, ended up with one of evolution’s most ...

Male "ghost sharks"—eerie deep-sea fish known as chimaeras that are related to sharks and rays—have a strange rod jutting ...

Named for its razor-like teeth, Novaculadon mirabilis came from a rodent-like order that outlived the dinosaur extinction before vanishing about 30 million years ago.

In the history of teeth, perhaps no tooth is as famous as the saber tooth. These long, blade-like canines seem almost perfectly optimized to kill prey. They've evolved at least five times in ...

Found on the southern coast of Australia, the species could fill gaps in scientists' understanding of baleen whale evolution ...

While the average iguana is harmless to humans, they have sharp teeth that can cause significant damage.