Saturday, September 4, 2010

Polar Bear Blues

Ever notice that a polar bear's tongue is a blue / black color? That is because their entire body is the same tone! Their skin is a dark tone because darker colors absorb light more readily than lighter ones. Their hair is actually transparent and hollow. These hollow hairs, made mostly out of Keratin (a material that makes up the outer layer of your skin), trap the sunlight heat hitting the bear and channel it down towards the body to keep it warm. The hairs have also been known to collect algae from time to time and the bear will appear a green color:

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