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.Continue Reading
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 about Polar Bears
Polar bears have a variety of adaptations that allow them to survive in their Arctic homes. While many of their adaptations help them to hunt more effectively, other adaptations allow the bears to survive in the frigid temperatures. However, some of the most important adaptations polar bears have are those that help them to swim.Full Answer >
Polar bears are large, carnivorous predators that live in the Arctic. They are the largest land predator on Earth, and unlike other bears who forage for nuts and berries, live almost entirely on meat.Full Answer >
The polar bear is a carnivorous marine mammal that lives exclusively in the Arctic. A female polar bear typically gives birth to one or two cubs per litter. Male adult polar bears can weigh as much as 1700 pounds and be 9 feet long. They are the second largest land carnivores in the world.Full Answer >
Polar bears possess a number of adaptations for the cold that keep them warm, including thick fur, thick fat and increased body size compared to other bear species. Due to these adaptations, polar bears are more likely to overheat than to experience hypothermia.Full Answer >