Martin Riddiford

Jan. 18, 2013

Inventors Design Lamp Powered Entirely by Gravity

The gravity-powered device uses a weight to generate up to 30 minutes of light as it descends.

light, lamp, led lamp, gravity, developing world, developing country, invention, engineering

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Comet's Tail Shines Light on Sun

\tIn 2011, comet Lovejoy traveled through the sun’s corona and lived to tell the tale. But its tail was the most telling. Reporting in the journal Science, Cooper Downs, an astrophysicist at Predictive Science Inc. in San Diego, Calif., says that the wiggly path of the comet’s tail helps explain the sun’s magnetic field. \t 

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