Thomas Edison revolutionized our world with the light bulb, the phonograph, and the forerunner to the movie camera. He also created a concrete piano, a non-operational helicopter made from box kites and piano wire, and a machine to speak to the dead. Edison was not the only one to engineer a complete flop now and again; in fact, failure amid greatness is the norm — not the exception. From Alexander Graham Bell's multi-nippled sheep to Leonardo da Vinci's walk-on-water shoes, these ludicrous ideas and faulty designs will leave you with a smile on your face.