Source: NASA News
A dune in the northern polar region of Mars shows significant changes between two images
taken on June 25, 2008 and May 21, 2010 by NASA's Mars Reconnaissance Orbiter.
Image credits: NASA/JPL-Caltech/Univ. of Ariz./JHUAPL.
Images from NASA's Mars Reconnaissance Orbiter (MRO) show sand dunes and ripples moving across the surface of Mars at dozens of locations and shifting up to several yards. These observations reveal the planet's sandy surface is more dynamic than previously thought. (read more)