Edited Mars Reconnaissance Orbiter image of layered sediments in Valles Marineris.

Edited MRO image of channels on a degraded impact basin rim.

Edited Mars Reconnaissance Orbiter image of sand dunes near Meroe Patera.

Edited Mars Reconnaissance Orbiter image of Swiss Cheese Terrain in the Martian South Polar Region. Color/processing variant.

Edited Mars Reconnaissance Orbiter PR image of icy landforms in a crater.

Edited Mars Reconnaissance Orbiter image of "pristine" dust deposits ("pristine" as "untouched," not "clean" or my desk would be considered "pristine") in Syria Planum on Mars.

Edited Mars Reconnaissance Orbiter image of slopes that are being monitored for changes in Eos Chasma. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a layered feature in a crater on the northern plains (which some scientists think was once a sea bed) of Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a layered feature in a crater on the northern plains (which some scientists think was once (as in a few billion years ago) a sea bed) of Mars.

Edited Mars Reconnaissance Orbiter image of east Nili Fossae.

Edited Mars Reconnaissance Orbiter image of furrowed dunes in Hyperborei Cavi. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of part of Innsbruck Crater. Processing variant.

Edited Mars Reconnaissance Orbiter image of a lava-filled crater (long since cooled off) in Elysium Planitia. NASA PR image version. Processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes on the southern highlands. Red channel (eg, grayscale) version from NASA.

Edited Mars Reconnaissance Orbiter image of a recent impact crater. Cropped, color variant.

Edited Mars Reconnaissance Orbiter image of landforms north of Huygens Crater on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of landforms north of Huygens Crater on Mars.

Edited Mars Reconnaissance Orbiter image of evidence of periodic bedding of terrain in Tithonium Chasma on Mars.

Edited Mars Reconnaissance Orbiter image of squiggle-like gullies in the Hellas Planitia region of Mars.

Edited Mars Reconnaissance Orbiter image of layers in Meridiani Planum. Color/processing variant.

Edited Mars Reconnaissance Orbiter</b image of unusual structures in the Martian north polar layered deposits.

Edited Mars Reconnaissance Orbiter image of the Mawrth Vallis region of Mars.

Edited Mars Reconnaissance Orbiter image of a hole in the ground in the Martian south polar cap.

Edited Mars Reconnaissance Orbiter</b image of atypical landforms in polar erg sand dunes.

Edited Mars Reconnaissance Orbiter image of part of the floor of Hellas Planitia. Color variant.

Edited Mars Reconnaissance Orbiter image of colorful layers of bedrock. Color variant.

Edited Mars Reconnaissance Orbiter image of stair-stepped hills in Arabia Terra.

Edited Mars Reconnaissance Orbiter image of sand dunes and craters on Mars.

Edited Mars Reconnaissance Orbiter image of a crater in the south polar region of Mars that is 540 meters in diameter.

Edited Mars Reconnaissance Orbiter image of chaotic, uplifted bedrock on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of light-toned outcroppings in Aureum Chaos.

Edited Mars Reconnaissance Orbiter image of the residual south polar cap.

Edited Mars Reconnaissance Orbiter image of West Ladon Valles on Mars.

Edited Mars Reconnaissance Orbiter image of hills ("knobs") and valleys in the Acidalia Planitia region of Mars.

Edited Mars Reconnaissance Orbiter Image of furrows on dunes at a location named (rather dubiously) "Ts and Vs". Color variant.

Edited Mars Reconnaissance Orbiter image of a concentric dome out in the middle of no where (well, that's not true - it's in Utopia Planitia).

Edited Mars Reconnaissance Orbiter image of north Meridiani Planum.

Edited Mars Reconnaissance Orbiter image of ridges and troughs in a crater in Terra Cimmeria. Color variant.

Edited Mars Reconnaissance Orbiter image of a canyon in Cerberus Fossae.

Edited Mars Reconnaissance Orbiter image of a crater with dark night-time infrared ejecta in Daedalia Planum.

Edited Mars Reconnaissance Orbiter image of slopes in Juventae Chasma.

Edited Mars Reconnaissance Orbiter image of the western wall and crater rim of a crater in Hesperia Planum.

Edited Mars Reconnaissance Orbiter image of Canberra Crater on Mars. Inverted image variant.

Edited Mars Reconnaissance Orbiter image of what looks like a fracture on the surface of Mars. Processing variant.

Edited Mars Reconnaissance Orbiter image of a section of bedrock on Mars along with hills and sand dunes. Processing variant.

Edited Mars Reconnaissance Orbiter image of a crater that is on the edge of a valley rim in Capri Chasma on Mars. Inverted grayscale variant.

Edited Mars Reconnaissance Orbiter image of a crater that is on the edge of a valley rim in Capri Chasma on Mars. Processing variant.

Edited Mars Reconnaissance Orbiter image of a dune field with a crater in the middle. Color variant.

Edited Mars Reconnaissance Orbiter image of a crater with sand dunes at the bottom, being monitored for slope changes. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of fingerprint terrain on Mars.