Everybody knows that Thomas Edison devised electric light and domestic electricity supplies, that Guglielmo Marconi thought up radio and George Westinghouse built the world's first hydro-electric power station. Everybody knows these 'facts' but they are wrong. The man who dreamt up these things also invented, inter-alia, the fluorescent light, seismology, a worldwide data communications network and a mechanical laxative. His name was Nikola Tesla, a Serbian-American scientist, and his is without doubt this century's greatest unsung scientific hero.
