Why do we have dreams and what do they mean? These questions have for centuries been the subject of a debate that has recently become the center of a heated controversy. In one camp we have a number of prominent scientists who argue that we dream for physiological reasons alone and that dreams are essentially mental nonsense devoid of psychological meaning: A tale told by an idiot, full of sound and fury, signifying nothing." The idea that dreams are nothing more than "meaningless biology" sounds absurd and rather blasphemous to the opposin ....