1) Polar bears are considered a marine mammal probably because they spend just as much time on ice as they do on land.
2) Even though our eyes tell us differently, a polar bear's fur is not white. Each hair is completely colour-free and transparent with a hollow core. Polar bears look white because the hollow core scatters and reflects visible light, just like ice and snow does. When photographed with film sensitive to ultraviolet light, polar bears appear black.
3) A polar bear is so well insulated that it loses almost no heat! In addition to its thick fur, the bear's blubber can be up to 4.5 inches thick and adult males quickly overheat when they run!
And here are 10 funny facts about polar bears…but I don’t think they are all true! Worth a look!
source by discover
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