Turning on a 100-year-old light bulb

Incandescent lights work by turning heat into light. You run an electric current through a filament, the filament heats up, and as it does, it starts to glow. The basic element has been around since 1809. The trick is finding material for a filament that will get hot enough to glow, but won't destroy itself [...]

Source: http://boingboing.net/2012/03/28/turning-on-a-100-year-old-ligh.html

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