Bear Facts Polar bears are the largest land carnivoires in North America. A bear can easily kill a 250kg seal, its favorite food, with a single blow of its paw. Although a polar bear's coat is white, its skin is black. A female polar bear won't have her first young, usually twins, until she is five or six years old. Then she will have about two cubs every three or four years.
Wildlife biologists can determine a bear's age by removing a small tooth.
In the lab, the root of the tooth is sliced diagonally and the rings are counted revealing the bear's age. As polar bears age, the distance between their cheekbones increases and their faces become wider. The head of a large drugged bear is almost too heavy for a person to lift. Out of a population of 1000 polar bears, only 30 males and 15 females may be taken by hunters in any given year, otherwise the population will start to decrease.