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Dust Devils Rip Up Mars' 'Etch A Sketch' Surface

In side-by-side comparisons of observations of the same Mars region years apart, the active Martian atmosphere acts like an Etch A Sketch, rubbing out dust devils' tracks only for them to re-form years later.

Published On 05/16/2013
2:51 PM EDT
Side by side comparison of the same region (nearly four years apart) of Nili Fossae as imaged by the HiRISE camera. The dark lines are dust devil tracks. | NASA/JPL/University of Arizona
Detail of dust devil tracks in the Nili Fossae region of Mars as imaged by the HiRISE camera in March 2013. Streaks of fallen material down slopes are also shown. | NASA/JPL/University of Arizona