A man who shared an unusual x-ray that shows he has a tooth inside his chin has wowed the internet. "Go brush your chin," joked one commenter. "Cool! (Unless it hurts, then that part is not cool)," ...

You may have learned that one way to tell crocodiles and alligators apart is whether their bottom teeth are showing. But did you know that both alligators and crocodiles have more teeth growing inside ...