Artist concept of Glaciers on Mars

This global map of Mars was acquired on Aug. 4, 2012, by the Mars Color Imager instrument on NASA's Mars Reconnaissance Orbiter.

The Mars Reconnaissance Orbiter took this photo of the Curiosity rover in September 2015, as Curiosity was exploring the boundary between two rock units: the light-toned Murray Formation and the ov...

This image (top) taken by the Shallow Radar instrument on NASA's Mars Reconnaissance Orbiter reveals the layers of ice, sand and dust that make up the north polar ice cap on Mars

Mars Reconnaissance Orbiter captures the springtime thaw of seasonal carbon dioxide ice on Mars.

Martian gullies as seen in the top image from HiRISE on NASA's Mars Reconnaissance Orbiter resemble gullies on Earth that are carved by liquid water. However, when they are observed with the additi...

A dust storm continues to envelop the Red Planet and Curiosity’s labs are back in action.

The movie you're watching here is a sequence of 3 HiRISE images that were taken of an object that might be the Beagle 2 lander in the Isidis Planitia.

This HiRISE image shows a group of cones, shield-like features, and round mounds.

This HiRISE image shows fractured mounds on the southern edge of Elysium Planitia.

The yellow line on this map shows where NASA's Mars Rover Opportunity has driven from the place where it landed in January 2004 -- inside Eagle crater, at the upper left end of the track -- to a po...

Shown here is a stereo pair of a well-preserved impact crater about 6 or 7 kilometers wide from rim to rim.

Impact cratering and erosion combine to reveal the composition of the Martian underground by exposing materials from the subsurface.

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

Lyot Crater, pictured here, is one of at least nine craters in the northern lowlands of Mars with exposures of hydrated minerals detected from orbit, according to a June 25, 2010, report.

This 3D, or stereo anaglyph, view shows the upcoming science destination for NASA's Mars rover Curiosity, a region dubbed "Glenelg," where three different types of material seen from orbit come tog...

This back and forth comparison shows changes that occurred in a gully on a south-facing slope in middle southern latitudes of Mars.

This image, acquired on May 15, 2018, by NASA's Mars Reconnaissance Orbiter, shows relatively bright mounds scattered throughout darker and diverse surfaces in Chryse Planitia.

This pair of images taken one day apart by the Mars Color Imager (MARCI) weather camera on NASA's Mars Reconnaissance Orbiter reveals when an asteroid impact made the scar seen in the right-hand im...

Details of hilly terrain within a large Martian canyon are shown on a geological map based on observations from NASA's Mars Reconnaissance Orbiter and produced by the U.S. Geological Survey.

The Russell Crater dune field is covered seasonally by carbon dioxide frost. This image shows the dune field after the frost has sublimated, or evaporated directly from solid to gas. There are just...

Lobate Debris Apron in Deuteronilus Mensae

This picture of a crater resembling a "happy face" was taken in January 2008, by the Mars Reconnaissance Orbiter's Context Camera. The unnamed crater is almost 2 miles (about 3 kilometers) across.

Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years. In this image from NASA's Mars Reconnaissance Orbiter frost in and around t...

This graphic depicts the relative shapes and distances from Mars for five active orbiter missions plus the planet's two natural satellites. It illustrates the potential for intersections of the spa...

These images from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter show how the appearance of dark markings on Martian slope changes with the sea...