However, the iron in beaver teeth turns out to do a better job of fighting cavities than fluoride. Beavers don't get tooth decay thanks to this iron, ...

As the sun sets over a forest stream, a beaver family gets to work. For millions of years, these large rodents with bright orange teeth and a flat paddle-shaped tail have been reshaping landscapes by ...

Modern beaver incisors (front teeth) are sharp and chisel-like; giant beaver incisors were bulkier and curved, and lacked a sharp cutting edge. The species suddenly became extinct 10,000 years ago.

The mountain beavers don’t need those teeth now, but they did about 10 to 15 million years ago, which is when these teeth features first appear in the fossil record.

Why do beavers slap their tails? It's a question that has puzzled and fascinated nature lovers for years. Imagine a quiet ...

— Cora Wieneke, Mount Horeb, Wis. A Erin Flynn, conservation education curator at Henry Vilas Zoo in Madison, Wis.: Squirrels, beavers, chipmunks and rabbits all have similarly shaped teeth ...

Mountain beavers (Aplodontia rufa) have teeth with deep crowns, thick enamel and short roots – a condition called hypsodonty, typical of animals that chew gritty, silica-rich grasses.

Squirrels, beavers, chipmunks and rabbits all have similarly shaped teeth because all of those animals have teeth that continually grow throughout their lives.