Humans are the most environmentally diverse species on the planet.
It's an amazing observation when one considers that water boils over a similar range of temperatures. Therefore, a truly unique challenge is the maintenance of a relatively stable body temperature in the face of these extreme environmental conditions. Although humans seem to be an extreme case, all species are faced with a similar problem. The process that all use to adapt to these situations is referred to as thermoregulation. The mechanisms that species use are extremely varied.