Polar bears are warm–blooded mammals, yet they live in freezing Arctic temperatures. They retain their body heat because of a thick coat of fur as well as a thick layer of fat under their skin. Fur and fat are poor conductors of heat, or good insulators.
read more.....
http://www.wonderwhizkids.com/index.php/polar-bears
read more.....
http://www.wonderwhizkids.com/index.php/polar-bears
Post a Comment