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Description: Take a tour through the world of the light-emitting diode.Learn - who invented it, how to use it, and how to make your own.nn Collin Cunningham: People are fascinated by light. I mean just glancing over at a display of flashing lights can grab my attention. Do you ever remember sitting around a campfire? Staring at the flames and just being totally transfixed, almost like if you're watching TV. It's comforting, and it can even by hypnotic. Recently, technology has made creating light a whole l