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You Built What?!: A Street-Legal Three-Wheeler That Runs on Nearly 2,000...
DIY The Canadian Road Hawk Nap Pepin had been waiting on the side of the highway near his Alberta, Canada, home for more than hour when the tow truck finally pulled up. The driver looked at the… Nap...
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The Thousand-Year-Old Viking Sunstone
Technology A thousand years ago, Vikings navigated with a sunstone, which they used to locate the sun on cloudy days. The stone—a calcite crystal called Iceland spar—funnels light into… A thousand...
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The Goods: April 2012's Hottest Gadgets
Gadgets A dozen great ideas in gear This month's roundup of The Goods includes hiking boots with sliding plates in the heels, a lightbulb with a speaker in it (or a speaker with a lightbulb in it?...
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A Model Disaster
Technology Have engineers learned anything from the loss of the unsinkable Titanic? Will they ever? The hundredth anniversary of the wreck of the Titanic on April 15 provides a welcome moment to...
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Gray Matter: Want a Chemical Reaction Without Heat? Add a Catalyst
DIY How does this copper earring glow without any flame or current? The copper earring you see here had already been glowing bright orange for half an hour when we took the photograph. There is no...
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