Drip, Drip Water Clocks
Engineering / Breakthroughs
Water clocks were among the earliest timekeepers that didn't depend on the observation of celestial bodies. One of the oldest was found in the tomb of the Egyptian pharaoh Amenhotep I, buried around 1 continue reading this fact
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Cool Fuel Cells
Engineering / Breakthroughs
Astronauts have been using them for power aboard spacecraft since the 1960s. Soon, perhaps, they'll be just as common on Earth--powering cars, trucks, laptop computers and cell phones. They're called continue reading this fact
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How Can A Bullet-proof Vest Stop A Bullet?
Engineering / Breakthroughs
Here's an experiment: take the small coil springs from a dozen or so retractable pens and roll them together in a heap until they are thoroughly tangled and entwined. Now try to pull them apart from e continue reading this fact
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