Polar bear design features enable them to live in a region of incredible cold. Previously, we reported that polar bear fur is hollow, providing insulation and creating an optical effect that looks white. New research by Norwegian nanophysicist Bodil Holst has shown how a polar bear can climb out of freezing water and then walk around in temperatures as low as minus 40. It has nothing to do with its fur, but because the polar bear has glands in its skin that secrete a grease resistant to freezing called sebum.
The skin of mammals, including humans, secretes sebum that makes hair greasy. Tests of other forms of sebum have shown that only polar dear sebum has the properties that keep the fur from freezing. At the same time, it lacks squalene that makes ice stick. There is great interest in this discovery not only from scientists but also from industries. It can potentially replace toxic de-icing chemicals used in ski wax and for plane de-icing.
Humans have benefited from many things copied from animals and plants. Common examples include Velcro (thistles), airplane design (bird wings), and synthetic fibers (spider webs). Polar bear design features are among the unique designs we see in the living world. They are not accidents but deliberate designs by a Creator, allowing life to thrive everywhere on planet Earth. As with polar bears, animals and plants usually have more than one specialized design feature.
— John N. Clayton © 2025
