Another bear fact, I feel like posting one. A polar bear's hair is not actually white, but is instead transparent.
This allows sunlight to reach the bears skin, which is black for maximum heat absorption and covers a thick layer of fat for insulation. The result is a highly effective way for the bear to stay warm, even in the coldest parts of the Arctic year. In fact, especially in the summer months, most polar bears instead have problems keeping
cool,
and are often seen rolling around in ice or snow to cool them selves off, as you can see to the left.
This allows sunlight to reach the bears skin, which is black for maximum heat absorption and covers a thick layer of fat for insulation. The result is a highly effective way for the bear to stay warm, even in the coldest parts of the Arctic year. In fact, especially in the summer months, most polar bears instead have problems keeping cool, 
and are often seen rolling around in ice or snow to cool them selves off, as you can see to the left.
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