A fascinating look at a scientific discovery that changed the world. Through an engaging text and numerous photographs and illustrations, Carla Killough McClafferty tells the history of the X-ray, from its discovery to its uses today. The story begins in 1895, when Wilhelm Roentgen accidentally saw the bones of his own hand while experimenting with cathode rays in his laboratory in Germany. His gift to science led to an amazing revolution in medicine, but not without a terrible price: it was only through many scientists' injuries and deaths that the dangers of X-ray exposure were revealed. McClafferty's chronicle also covers such things as the use of X-rays in examining fine art and identifying forgeries; the study of Egyptian mummies by X-rays; and X-ray use in everything from astronomy to paleontology, from airplane manufacture to the familiar dentist's office. McClafferty writes with an infectious excitement about her subject, with plenty of humor and respect for her intended young audience.