· One in every 2,000 babies is born with a tooth.
· The average human produces 25,000 quarts of spit in a lifetime, which is enough to fill two swimming pools.
· Squirrel and rabbit teeth grow continuously. Their incisors will grow six inches per year but stay short due to the constant wear they receive.
· Cats have 30 teeth and dogs have 42.
· In the United States, close to 3 million miles of dental floss was purchased in 1996 by dental consumers.
· Paul Revere was a practicing dentist.
· A crocodile replaces its teeth more than forty times in a lifetime.
· Turtles and tortoises are toothless.
· A mosquito has 47 teeth.
· The Statue of Liberty's mouth is three feet wide.
· An elephant's tooth can weigh more than six pounds!
· Some whales do not have teeth. Instead, they have rows of stiff hair like combs that take food out of the ocean.
· Snails are very small but they can have thousands of tiny teeth all lined up in rows.
· Minnows have teeth in their throat.
· Lemon sharks grow a new set of teeth every two weeks. They grow more than 24,000 new teeth every year!
· "Long in the tooth," meaning "old," was originally used to describe horses. As horses age, their gums recede, giving the impression that their teeth are growing. The longer the teeth look, the older the horse.
· Every person has a unique tongue print.
· It takes 17 muscles to smile but 43 to frown.
