"There are noctilionoid species that have short faces like bulldogs with powerful jaws that can bite the tough exterior of the fruits that they eat."

Exceedingly hard or tough foods might have given Homo floresiensis (nicknamed the Hobbit) a sore jaw. But stone tools may have made chewing easier.

When they bit down, young T. rexes exerted up to 5,641 newtons of force. That's somewhere between the jaw forces exerted by a hyena and a crocodile.

Prehistoric sharks rotated their jaws keeping larger, sharper teeth in an upright position, making it "easier for them to impale their prey."

If lifestyle, not genetics, is shrinking human jaws, perhaps the answer isn't orthodontics, but better "oral posture." Here's what that involves.

"...it seems that wombats are able to remodel their jaws as the animals grow to become stronger and protect themselves from harm."

"The T. rex had a skull that's 6 feet long, 5 feet wide, and 4 feet high, and bites with the force of about 6 tons."

Researchers have developed a way to grow a new, live jawbone from ribs.