They have long hairs, black skin that you can't see to attract sunlight, and four inches of blubber under their skin to keep warm. They are so efficient at keeping heat inside them that they are...
A polar bears fur appears white, but it is actually clear. It is hollow fibre and traps heat to keep it warm. The white that it appears too protects them from predators (if any) and mainly to keep...
The polar bear, like many other animals, hibernates (deep sleep) through out winter. An animal must have special features to help it adapt to their environment. Before winter arrives the polar bear...