Polar Bears are the largest bears in the world, along with the Kodiak Bear. They are the same size. It is also the largest land carnivore, meaning it is the biggest animal alive that only eats meat. A adult male is called a boar. An adult female is called a sow.
A boar ways about 770 pounds to 1,500 pounds! A sow ways about half that size. Polar bears are pretty smart. They are about as smart as apes. And apes are our cousins! They are very intelligent. Most people think they were around five million years ago.