Alan Wilson via Wikimedia Commons under CC BY-SA 3.0 Polar bears don’t have to worry about skipping a wash day. The sebum, or natural oil, on the mammals’ fur helps them survive the harsh ...

Polar bears need all the help they can get to survive their frosty Arctic environment. One of their biggest survival secrets appears to be greasy hair. The sebum–or hair grease–on their fur ...

White fur, blubbery skin, sharp claws. Polar bears seem perfectly adapted to their ... which are used to repel oil, heat, water and ice. “If we do it in the right way, we have a chance of ...