Polar bear
Ursus maritimus, a large bear that hunts seals on Arctic sea ice and is among the largest living land carnivores.
A polar bear's fur isn't white. Each hair is hollow, transparent keratin, and the skin beneath is jet black. It looks white because air pockets in the hairs scatter every colour of sunlight. The clear fur traps light and the black skin absorbs its heat, keeping the bear warm.
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