In 1876, at only 29 years old, Alexander Graham Bell completed the invention that would turn him into a household name: the telephone. In so doing, he forever changed the way people communicate. But the telephone was just one of the many inventions Bell produced and shared with the world. Driven by a deep curiosity and a keen scientific mind, he worked on groundbreaking inventions in an astonishing range of fields, including aviation and medicine. This is the amazing story of his most important discoveries, and his passionate, lifelong quest to improve the way things work.