Polar Bears Have White Fur
Although popular belief maintains that polar bears are white, this assumption is false. In actuality, polar bear fur is colorless, and their skin is black. So how did they gain the reputation of being brilliantly white?
Unlike human and most mammal hair, polar bear hair is hollow. In other words, their strands of hair are shaped like tubes; the holes within these tubes are small enough that they can’t be seen without a microscope but large enough to let light in. This causes the bears to appear white when the light inside their fur is scattered.