Artist concept of Glaciers on Mars

Sand dunes are among the most widespread wind-formed (aeolian) features present on Mars.

This image covers plains near Aureum Chaos.

The Coloe Fossae region is a series of enclosed, intersecting canyons. The floors of the canyons in this image contain complex set of ridges and grooves that are generally parallel to the canyon wa...

NASA's Curiosity Mars rover can be seen in this image taken from space on May 31, 2019, by the HiRISE camera aboard the Mars Reconnaissance Orbiter. In the image, Curiosity appears as a bluish speck.

This field of dunes lies on the floor of an old crater in Noachis Terra, one of the oldest places on Mars.

NASA's Mars Reconnaissance Orbiter (MRO) keeps finding new impact sites on Mars. This one occurred within the dense secondary crater field of Corinto Crater. The new crater and its ejecta have dist...

This series of images shows warm-season features that might be evidence of salty liquid water active on Mars today.

This image taken on May 19, 2010, shows an impact crater that had not existed when the same location on Mars was previously observed in March 2008.

A dramatic, fresh impact crater dominates this image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on Nov. 19, 2013.

This animation demonstrates the salty ponds and streams that scientists think may have been left behind as Gale Crater dried out over time. The bottom of the image is the floor of Gale Crater, with...

This image, acquired on May 13, 2018 by NASA's Mars Reconnaissance Orbiter, shows sand dunes scouring what appears to be a highly-cratered, old lava flow in the Tempe Terra region, located in the N...

This map shows five locations where fresh impact cratering has excavated water ice from just beneath the surface of Mars (sites 1 through 5) and the Viking Lander 2 landing site (VL2), in the conte...

This series of images shows warm-season features that might be evidence of salty liquid water active on Mars today.

This impact crater in south Syrtis Major was captured by the HiRISE instrument on NASA’s MRO. Afterward, CRISM data was layered on top to reveal which minerals were present.

NASA's Mars Reconnaissance Orbiter arrived at Mars on March 10, 2006. Over the past decade, the mission has shown how dynamic Mars remains today, as well as how diverse its past environmental condi...

Researchers have found deposits of impact glass preserved in Martian craters, including Alga Crater, shown here.

This Southern autumn image captures a view of frosty dunes. The sunlight is shining on the dunes from the upper right.

HiRISE image of Planum Chronium Region.

A meteorite impact that excavated this crater on Mars exposed bright ice that had been hidden just beneath the surface at this location.

Small impact craters usually have simple bowl shapes, but sometimes more complicated shapes can occur if the target is unusual.

This image shows a cross-section of a portion of the north polar ice cap of Mars, derived from data acquired by the Mars Reconnaissance Orbiter's Shallow Radar (SHARAD), one of six instruments on t...

This image is located within Northern Sinus Meridiani, a region of ridged terrains and extensive stratigraphic layering. 

This view taken from orbit around Mars shows the sand dune that will be the first to be visited by NASA's Curiosity Mars Rover along its route to higher layers of Mount Sharp.

This image acquired on February 7, 2019 by NASAs Mars Reconnaissance Orbiter, shows Mawrth Vallis, a place on Mars that has fascinated scientists because of the clays and other hydrated minerals de...

This map traces where NASA's Mars rover Curiosity drove between landing at a site subsequently named "Bradbury Landing," and the position reached during the mission's 123rd Martian day, or sol, (De...