Derocher writes in his book, Polar Bears-A Complete guide to their Biology and Behavior, “Fibre optic properties of a polar bear hair appears to be less than a thousandth of a percent of the light traveled 2.5 cm (1 inch).” The loss of ultraviolet light is thought to occur in a fraction of that distance. They thought that the bear’s fur serves as a fiber optic filament in that they transmit light all the way to the skin.

Scientists do not know the primary reason behind this change.īack in 70s a group of scientists carried out a study in which they revealed that the bear absorbs ultraviolet light. Let us not forget that the present-day polar bears have been evolved from grizzlies. That said, white bears have eventually evolved to acquire black skin in adults-probably an adaptation trait. On the contrary, grizzly bears have pink skin not only in cubs but in adults too. Unlike adults, the polar bear cubs have pink-colored skin especially in the first 150 days. Let’s then discover what color are polar bears actually. The black naked portion of the body becomes prominent for as long as it is covered by the hair again.

One can hardly see the black skin except in situations when a polar bear sheds its hair possibly due to some disease or infection. The polar bear’s skin is jet black which is in contrast to the bear’s white fur. People often wonder if the polar bear’s fur is white then its skin is probably white too.

Eq polar bear skin