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Dust devils occur on Earth as well as on Mars. They are spinning columns of air, made visible by the dust they pull off the ground. Unlike a tornado, a dust devil typically forms on a clear day when the ground is heated by the sun, warming the air just above the ground. As heated air near the surface rises quickly through a small pocket of cooler air above it, the air may begin to rotate, if conditions are just right. Articles about ASTRONOMY: http://www.scoop.it/t/science-news?tag=astronomy 
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![[VIDEO] - Twister On Mars! Orbiter Captures Dust Devil Reaching Into Atmosphere | Video | Science News | Scoop.it](https://img.scoop.it/UaUcMIL04Drg65w6DKmt9Dl72eJkfbmt4t8yenImKBVvK0kTmF0xjctABnaLJIm9)
NASA's Mars Reconnaissance Orbiter's image of this dust devil was converted to 3D imagery. It’s ½-mile tall with a 100 ft-wide core. But because Mars' atmosphere is so thin, these "tornadoes" aren't very strong compared to Earthly counterparts.
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One year after the historic tornado outbreak of April 27-28, 2011, researchers say they've learned a few things about deadly twisters. This week's ScienceCast presents some of the scientific findings that emerged from the swath of destruction.
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An afternoon whirlwind on Mars lofts a twisting column of dust more than half a mile (800 meters) high in an image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.
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