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The floors of these craters imaged by NASA's Mars Odyssey contain very interesting and enigmatic materials that may hold shallow subsurface ground ice with varying amounts of a sediment covering (mantle).
The floors of these craters imaged by NASA's Mars Odyssey contain very interesting and enigmatic materials that may hold shallow subsurface ground ice with varying amounts of a sediment covering (mantle).

Nilosyrtis Mensae

In this image from NASA's Mars Odyssey, the late afternoon sun casts a shadow over a rim of Huygens Crater that's 700 meters (nearly 2,300 feet) high.
In this image from NASA's Mars Odyssey, the late afternoon sun casts a shadow over a rim of Huygens Crater that's 700 meters (nearly 2,300 feet) high.

Crater Rim

A variegated mottled texture located NW of the volcano Elysium Monsis is readily apparent in the terrain imaged here by NASA's Mars Odyssey spacecraft. The Hrad Vallis channel system can be seen sauntering across the bumpy landscape of Utopia Planitia.
A variegated mottled texture located NW of the volcano Elysium Monsis is readily apparent in the terrain imaged here by NASA's Mars Odyssey spacecraft. The Hrad Vallis channel system can be seen sauntering across the bumpy landscape of Utopia Planitia.

Complex and Perplexing Mars

One of the many branches of the Mangala Vallis channel system is seen in this image from NASA's Mars Odyssey spacecraft. The water that likely carved the channels emerged from a huge graben or fracture almost 1000 km to the south.
One of the many branches of the Mangala Vallis channel system is seen in this image from NASA's Mars Odyssey spacecraft. The water that likely carved the channels emerged from a huge graben or fracture almost 1000 km to the south.

Northwestern Branch of Mangala Vallis

The fractured surface shown in this image from NASA's Mars Odyssey spacecraft belongs to a portion of a region called Gorgonum Chaos located in the southern hemisphere of Mars.
The fractured surface shown in this image from NASA's Mars Odyssey spacecraft belongs to a portion of a region called Gorgonum Chaos located in the southern hemisphere of Mars.

Gullies of Gorgonus Chaos

Hebrus Valles is located in the Elysium Planitia region of the northern lowlands of Mars. This image from NASA's Mars Odyssey spacecraft shows three sinuous tributaries of the channel system which carved up the surrounding plains.
Hebrus Valles is located in the Elysium Planitia region of the northern lowlands of Mars. This image from NASA's Mars Odyssey spacecraft shows three sinuous tributaries of the channel system which carved up the surrounding plains.

Hebrus Valles

This NASA Mars Odyssey image shows a portion of a volcano called Alba Patera. This region has many unique valley features that at first glance look much like the patterns formed by rivers and tributaries on Earth, but are actually quite discontinuous.
This NASA Mars Odyssey image shows a portion of a volcano called Alba Patera. This region has many unique valley features that at first glance look much like the patterns formed by rivers and tributaries on Earth, but are actually quite discontinuous.

Alba Patera

Layering is visible in these deposits on the floor of Juventae Chasma in this image captured by NASA's 2001 Mars Odyssey.
Layering is visible in these deposits on the floor of Juventae Chasma in this image captured by NASA's 2001 Mars Odyssey.

Juventae Chasma

The muted terrain of northern Acidalia Planitia, as seen in this image from NASA's Mars Odyssey spacecraft, testifies to the fact that the region is heavily mantled with dust.
The muted terrain of northern Acidalia Planitia, as seen in this image from NASA's Mars Odyssey spacecraft, testifies to the fact that the region is heavily mantled with dust.

Ridges swimming in a sea of dust

NASA's Mars Exploration Rover Spirit welcomed the beginning of 2006 on Earth by taking this striking panorama of intricately rippled sand deposits in Gusev Crater on Mars.
NASA's Mars Exploration Rover Spirit welcomed the beginning of 2006 on Earth by taking this striking panorama of intricately rippled sand deposits in Gusev Crater on Mars.

Intricately Rippled Sand Deposits

This image from NASA's Mars Reconnaissance Rover shows the north polar region of Mars is surrounded by a large sea of dark sand dunes that become covered by seasonal carbon dioxide frost.
This image from NASA's Mars Reconnaissance Rover shows the north polar region of Mars is surrounded by a large sea of dark sand dunes that become covered by seasonal carbon dioxide frost.

Polygons, Crater Layers, and Defrosting Dunes

This observation from NASA's Mars Reconnaissance Orbiter shows light-toned layered deposits at the contact between the Ladon Valles channel and Ladon Basin.
This observation from NASA's Mars Reconnaissance Orbiter shows light-toned layered deposits at the contact between the Ladon Valles channel and Ladon Basin.

Sediments in Ladon Basin

This image taken by NASA's Mars Odyssey spacecraft shows a classic example of a Martian impact crater with a central peak. Central peaks are common in large, fresh craters on both Mars and the Moon.
This image taken by NASA's Mars Odyssey spacecraft shows a classic example of a Martian impact crater with a central peak. Central peaks are common in large, fresh craters on both Mars and the Moon.

Impact Crater with Peak

This map shows in red the route driven by NASA's Curiosity Mars rover from the 'Bradbury Landing' location where it landed in August 2012 to nearly the completion of its first Martian year. The white line shows the planned route ahead.
This map shows in red the route driven by NASA's Curiosity Mars rover from the 'Bradbury Landing' location where it landed in August 2012 to nearly the completion of its first Martian year. The white line shows the planned route ahead.

Curiosity's Progress on Route to Mount Sharp

These craters on Tharsis are first visible as new dark spots observed by NASA's Mars Reconnaissance Orbiter's Context Camera (CTX), which can view much larger areas, and then imaged by HiRISE for a close-up look.
These craters on Tharsis are first visible as new dark spots observed by NASA's Mars Reconnaissance Orbiter's Context Camera (CTX), which can view much larger areas, and then imaged by HiRISE for a close-up look.

An Icy Crater on Mars

This observation from NASA's Mars Reconnaissance Orbiter shows the end of a small channel near Athabasca Valles on Mars. Athabasca is an example of a Martian 'outflow channel,' likely carved by a massive flood of groundwater.
This observation from NASA's Mars Reconnaissance Orbiter shows the end of a small channel near Athabasca Valles on Mars. Athabasca is an example of a Martian 'outflow channel,' likely carved by a massive flood of groundwater.

Channel in the Cerberus Palus Region

Landslides in Valles Marineris are truly enormous, sometimes stretching from one wall to the base of another. This landslide, known as Ius Labes, would occupy the surface area of the state of Delaware, U.S., seen by NASA's Mars Reconnaissance Orbiter.
Landslides in Valles Marineris are truly enormous, sometimes stretching from one wall to the base of another. This landslide, known as Ius Labes, would occupy the surface area of the state of Delaware, U.S., seen by NASA's Mars Reconnaissance Orbiter.

Northwest Ius Chasma Landslide and Dune Field

This is a picture of 'Block Island' an odd-shaped, dark rock, which may be a meteorite.
This is a picture of 'Block Island' an odd-shaped, dark rock, which may be a meteorite.

Block Island Close-up

This image of 'Block Island' was taken on July 28, 2009, with the front hazard-identification camera on NASA’s Mars Exploration Rover Opportunity.
This image of 'Block Island' was taken on July 28, 2009, with the front hazard-identification camera on NASA’s Mars Exploration Rover Opportunity.

Block Island in Sight

This scene combines seven frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,891st Martian day, or sol, of Spirit's mission on Mars (April 28, 2009).
This scene combines seven frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,891st Martian day, or sol, of Spirit's mission on Mars (April 28, 2009).

Spirit's View from "Troy"

This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,866th Martian day, or sol, of  Spirit's mission on Mars (April 3, 2009). You will need 3-D glasses to view this image.
This stereo scene combines frames taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the 1,866th Martian day, or sol, of  Spirit's mission on Mars (April 3, 2009). You will need 3-D glasses to view this image.

Spirit's Look Ahead After Sol 1866 Drive (Stereo)

The robotic arm on NASA's Phoenix Mars Lander enlarged a trench beside a rock called 'Headless' on Sept. 20, 2008 in preparation for sliding the rock into the trench. 3D glasses are necessary to view this image.
The robotic arm on NASA's Phoenix Mars Lander enlarged a trench beside a rock called 'Headless' on Sept. 20, 2008 in preparation for sliding the rock into the trench. 3D glasses are necessary to view this image.

Preparation for Moving a Rock on Mars, Stereo View

This anaglyph, acquired by NASA's Phoenix Lander's Surface Stereo Imager on June 19, 2008, shows a view of the Martian surface near the lander. The trench shown here is informally called 'Snow White 1.' 3D glasses are necessary.
This anaglyph, acquired by NASA's Phoenix Lander's Surface Stereo Imager on June 19, 2008, shows a view of the Martian surface near the lander. The trench shown here is informally called 'Snow White 1.' 3D glasses are necessary.

Martian Surface as Seen by Phoenix

Images taken by NASA's Phoenix Mars Lander's Surface Stereo Imager, combined into a panoramic view looking north from the lander.
Images taken by NASA's Phoenix Mars Lander's Surface Stereo Imager, combined into a panoramic view looking north from the lander.

Phoenix Animation Looking North

This image taken by the Stereo Surface Imager aboard NASA's Phoenix Mars Lander focuses on items on the deck rather than the workspace or horizon on Sol 8.
This image taken by the Stereo Surface Imager aboard NASA's Phoenix Mars Lander focuses on items on the deck rather than the workspace or horizon on Sol 8.

Telltale Animation (Sol 8)

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