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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High Altitude
Engineering / Flight
Have you ever read the directions on a box of cake mix? There are special instructions for high-altitude baking. Has anyone who visited the Rocky Mountains told you how hard it was to breathe there? H continue reading this fact
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