Why does a polar bear's fur turn green?

Polar bears have fur that looks white... ...except for when when their fur turns green like this... ...or like this... ...or even like this... Why does their hair turn green, you ask? read more

In hotter ones, even if the bear is being regularly washed, algae starts growing inside the tube of hair, turning large sections of the bear green. (The Biggest Myth About Polar Bear Fur (And the Weirdest Truth) Tragically, once green, polar bears have lost their lucrative Coca-Cola sponsorships. read more

Polar bears skin is black and their fur is clear and transparent. So why then do polar bears look white . It is mainly because of reflection. While the hair is transparent it reflects the white light from the sun making the polar bears appear white in a similar way to snow and ice. read more