Hypothermia (from Greek ὑποθερμία)'s a condition in which an organism's temperature drops below that required for normal metabolism and bodily functions. In warm-blooded animals, core body temperature's maintained near a constant level through biologic homeostasis. But, when the body's exposed to cold, its internal mechanisms may be unable to replenish the heat that's being lost to the organism's surroundings. Hypothermia's the opposite of hyperther… (More on Hypothermia)