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Mars: Intersecting swirling trails left by the earlier passage of dust devils across sand dunes, as they lifted lighter reddish-pink dust and exposed the darker material below. Also visible are darker slope streaks along dune edges, formed by a process which is still under investigation.

This beautiful observation shows a gorgeous pattern of dust devil tracks. Like on Earth, they often expose materials just underneath the surface, which in this case, makes for stunning patterns. Image Credit: NASA/JPL-Caltech/University of Arizona.

Sand Dunes Surrounding Hills on Mars | Flickr - Photo Sharing!

Edited Odyssey image of sand dunes surrounding hills in the polar region (which I don't remember) of Mars.

Wind at Work on Mars HiRISE NASA/JPL/University of Arizona

Wind at Work on NASA's Mars Reconnaissance Orbiter Wind is one of the most active forces shaping Mars’ surface in today’s climate. The wind has carved the features we call “yardangs,” one of many in this scene, and deposited sand on the floor of

Orange Sand Dunes on Mars

Orange Sand Dunes (on Mars) by Stuart Rankin (i thought this was a brownie recipe before i read the description!

Flowing Barchan Sand Dunes on Mars | Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA

“ Flowing Barchan Sand Dunes on Mars Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA ” Explanation: When does Mars act like a liquid? Although liquids freeze and evaporate quickly into the thin.

Just some dunes...on MARS. Western Nereidum Montes

Dunes in the Western Nereidum Montes, on Arrakis-- I mean Mars. The Nereidum Montes mountain range stretches over 1000 kilometres and features mountains three to four thousands metres high. Photo: NASA/JPL/University of Arizona

Martian Fans-The HiRISE camera on board the Mars Reconnaissance Orbiter captured this look at the spectacular patterns created by wind-blown material on the south polar ice cap of Mars. The area shown is about a kilometer across. NASA / JPL / University of Arizona

The HiRISE camera on board the Mars Reconnaissance Orbiter captured this look at the spectacular patterns created by wind-blown material on the south polar ice cap of Mars. The area shown is about a kilometer across.

#MARTIANSTORMS - Seen in 1977 by the Viking 2 Orbiter “Like its predecessor, the Viking 2 mission consisted of a lander and an orbiter designed to take high-resolution images, and study the Martian surface and atmosphere. Both the Viking 1 and 2 landers benefited greatly from their orbiting counterparts, which snapped images that helped mission controllers navigate the landers to safe landing sites.”

astronomicalwonders: “ MARTIAN STORMS - Seen in 1977 by the Viking 2 Orbiter “Like its predecessor, the Viking 2 mission consisted of a lander and an orbiter designed to take high-resolution images, and study the Martian surface and atmosphere.

Similar to water-sculpted gullies on Earth, these gullies in Sisyphi Planum show well developed alcoves, deeply incised channels, and large depositional fans. These gullies could have formed under a different climate, or maybe by repeated bursts of transient fluids. Current leading hypotheses explaining the origin of gullies includes erosion from seepage or eruption of water from a subsurface aquifer, melting of ground ice, or dust-blanketed surface snow. | HiRISE

Veins of WaterVeiny gullies trace the walls of a large pit in Mars' southern hemisphere in this image, captured Aug. The gullies may have been carved by liquid water millions of years ago, when Mars was warmer and wetter.

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