Fluoride, a naturally occurring mineral, keeps teeth strong when added to drinking water, according to the Centers for Disease Control and Prevention and the American Dental Association.

The Dilophosaurus is probably the best-known dinosaur whose fossil remains have been found in Arizona. That’s because the movie "Jurassic Park” made it famous — or at least a version of it.

Sparkling white, flawlessly straight teeth have long been thought of as a key ingredient for a perfect smile among the rich and famous. Now, however, it seems a more natural and characterful set ...