Polar bears fur consists of a dense, insulating undercoat topped by guard hairs of various lengths. Polar bears do appear white to us. But there is more to this than meets the eye! Polar bears appear white, but their fur is not white. Each hair is made of keratin, the same substance found in our fingernails and hair.
read more.....
http://www.wonderwhizkids.com/index.php/polar-bears
read more.....
http://www.wonderwhizkids.com/index.php/polar-bears
Post a Comment