The fur on polar bears is clear, and their skin is black. Polar bears often appear to be white as a result light reflection. Polar bear fur may take on other colors, such as yellow or brown, depending on light and environmental conditions.
Polar bears' black skin helps keep them warm by retaining heat from the sun in their extremely cold habitat. Polar bears have a geographic span that includes Alaska, Canada, Russia, Norway and Greenland. Some other differences between polar bears and other bear species aside from their transparent fur is that polar bears are the biggest species and do not go through hibernation.