The simple act of chewing gum can raise the body’s metabolic rate by as much as 15 percent, a study finds.

An ancient animal’s hammer, anvil, and stirrup bones are at the base of the jaw but completely detached from it.

Researchers categorize the different jaws of piscivorous fishes.

Trap-jaw spiders have the fastest, most powerful bite of any arachnid, scientists show. 

Skull structures suggest that sauropod dinosaur species subsisted on different plant types.