He designed a transmitter to send and a receiver to detect radio waves. By the end of the century Marconi had managed to send signals over several miles with no wires, and the idea was taking hold ...

It details the history of radio by discussing the life of Marconi and how his invention helped to catch the notorious murderer, Dr Crippen.

(Heinrich Herz, for whom the units hertz and megahertz are named, had discovered and first produced radio waves in 1888.) Marconi jumped right on the problem. He began experimenting at his family ...