These Animals Don't Care That It's Freezing Outside

Animals are very successful in adapting to the conditions of their living environment. The reason why animals can adapt to ambient conditions where the weather is too cold or too hot is that they can regulate their body temperature.

Bison: These gigantic creatures have superb insulation. Bison have "thick skin and underfur, long guard hairs, and layers of fat," according to Yellowstone National Park. Try to look at one and not feel cozy.