The hair of a polar bear?

The hair of a polar bear helps it to trap a layer of air around its body. Explain how this layer of air helps the polar bear keep warm in its environment.

Public Comments

  1. polar bear hair isn't like regular hair. Each hair is more like a shaft or straw, really, hollow in the middle.
  2. The layer of air acts like a 'gas coat'. In other words, the 'layer of air' is just like an additional coating for the polar bear, reducing the amount of body heat loss. Several new synthetic fibers mimic this effect. Well, it you're doubting my answer, it's best to check it out in Wikipedia. IMHO, it's the best free web-based encyclopedia.
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