Polar bear fur isn’t white! Despite what your eyes may tell you, each bristle of hair is actually a transparent, hollow tube. Because the tubes are colorless, when piled on top of each other they can appear white, especially when snow gets mixed in. In captivity, however, chlorine or algae from man-made swimming pools can fill the fibers, making the bear appear green. Also, if polar bears spill Coca Cola on their coats, they can turn brown. That’s how grizzly bears are made!