Miracles often happen to the human body. Any deviation from the accepted norm goes unnoticed by no one. Among us live dwarfs, giants, and sleepwalkers. Some people are prone to hallucinations, others can’t eat at all, many long for lack of sun. These metamorphoses have always given rise to tall tales and myths—until science seriously took them up for study. Gavin Francis investigates the most persistent myths and explains their nature. He looks at changes in the bodies of his patients—both the hoped-for and the unwanted—and explains why these metamorphoses are not random and why they matter for all of humanity. The author supports every thought with cases from practice and stories from the history of medicine, art, literature, and myths.