Physicists explain thunderstorm 'sprites'

U.S. physicists have determined "sprites" -- bright bursts of light seen in thunderstorms -- travel at 1-10th the speed of light.

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<p><a href="http://www.physorg.com/news101578947.html">Physicists explain thunderstorm 'sprites'</a></p> <p>U.S. physicists have determined "sprites" -- bright bursts of light seen in thunderstorms -- travel at 1-10th the speed of light. </p>