Polar bears have white fur because it serves as camouflage in the Arctic snow, allowing them to blend into the environment and hunt. Polar bears, having evolved from grizzly bears thousands of years ago, also changed in other ways to survive in their habitat.Know More
The fur of the polar bear, despite popular belief, isn't actually white. It is transparent and reflects visible light, which gives it a white appearance. The shade of white varies on the time of year. The fur takes on the most brilliant shade of white just after the bears shed in the summer. Algae growth in polar bears' fur can even turn the animals green, which is a common occurrence in zoos.
Polar bears have dense fur that keeps them from losing body heat in the Arctic. Scientists believe that the keratin on the hairs absorbs ultraviolet light to keep the bears warm. Although bears do have a layer of fat, their thick coat is their primary defense against the cold. The fur is so efficient that the bears can overheat when they run. The fat layer does benefit the bears while swimming in icy water because fur does very little to keep them warm when it is wet.Learn More
A polar bear can live up to 18 years on average in the wild. In captivity, polar bears have been known to live up to 30 years.Full Answer >
Polar bears live in the Arctic along the shores of cold water. Pregnant polar bears usually have three babies, which are called cubs. They give birth to their cubs in the spring in holes in the ground, which are called dens.Full Answer >
Churchill polar bears are polar bears that migrate through the city of Churchill in Manitoba, Canada. The polar bears remain around Churchill from October through November, waiting for the Hudson Bay to freeze. The endangered bears serve as a huge tourist attraction for the city.Full Answer >
The World Wildlife Foundation estimates that there are between 20,000 and 25,000 polar bears left in the world. Between 60 and 80 percent of these animals live in Canada.Full Answer >