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Author Archives: Michael J. Coren
The World’s Cheapest Lightbulb Is Made Of Just A Plastic Bottle
In places where there is no grid, houses can be dark. But a simple solution–a plastic bottle stuck in the roof–can light up a room.We have lightbulbs made from glowing metal filaments, fluorescent gas, and LED diodes. And now we have one made of wate… Continue reading
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