A polar bear's skin is actually black. While their fur appears white or cream-colored, this coloration helps them blend in with their snowy and icy environment. The black skin beneath their fur absorbs sunlight, aiding in warmth retention in the frigid Arctic temperatures. The fur itself is made up of hollow hairs that reflect visible light, giving the bear its characteristic appearance. Polar bears are uniquely adapted to their cold habitat, with a thick layer of blubber and an insulating coat that keeps them warm, showcasing their remarkable evolutionary adaptations.