Magnificently charismatic and fun loving, Richard Feynman brought a sense of adventure to the study of science. As well as leaving his mark on nearly every aspect of modern physics, he was a hugely popular and respected teacher. His extraordinary career included wartime work on the atomic bomb at Los Alamos, a profoundly original theory of quantum mechanics, for which he won the Nobel Prize, and major contributions to the sciences of gravity, nuclear physics and particle theory. In 1986 he came to widespread public attention during the inquiry into the Challenger disaster when he proved conclusively that its cause was due to the effect of cold on the booster rocket rubber sealings. Skilfully interweaving personal anecdotes, writings and recollections with narrative, John and Mary Gribbin reveal a man of startling originality who had an immense passion for life. A fascinating portrayal of one of the greatest scientists of his generation, this stimulating account also provides a picture of the significant physics of the century.