The snail’s mouth is no larger than the head of a pin, but it can have over 25,000 teeth!

The Blue Whale is the largest mammal on earth, but it eats only tiny shrimp because it has no teeth!

Rats, mice and your hamster among others have teeth that grow continually. If you have one as a pet, it must have wood to gnaw on to shorten its teeth, or it can die.