A series of still images from a captured video sequence of a gigantic jet observed near Duke University. The thunderstorm that produced this jet was about 200 miles away and is below the visible horizon. Credit: Steven CummerFrom Live Science:
Strokes of lightning flashing down towards the ground are a familiar sight during summer thunderstorms, but scientists have capture an image of a rare lightning bolt shooting out upwards from a cloud, almost to the edge of the Earth's atmosphere.
These bolts of upwards lightning, one type among a variety of electrical discharges now known to occur above thunderstaorms, are called gigantic jets, and were only first discovered in 2001.
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