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This image from NASA's 2001 Mars Odyssey spacecraft shows part of a dune field near the north polar cap. This is not Olympia Undae, the largest dune field near the north polar cap, but is rather a portion of a smaller dune field further to the east.
This image from NASA's 2001 Mars Odyssey spacecraft shows part of a dune field near the north polar cap. This is not Olympia Undae, the largest dune field near the north polar cap, but is rather a portion of a smaller dune field further to the east.

Polar Dunes

The lava flows and channel in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the eastern margin of Olympus Mons.
The lava flows and channel in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the eastern margin of Olympus Mons.

Lava Channel

The dunes in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of Lyot Crater.
The dunes in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of Lyot Crater.

Lyot Crater Dunes

The windstreak in this image from NASA's 2001 Mars Odyssey spacecraft is located on the northwestern plains of Daedalia Planum.
The windstreak in this image from NASA's 2001 Mars Odyssey spacecraft is located on the northwestern plains of Daedalia Planum.

Windstreak

Spring storms are common near the north pole. This image captured by NASA's 2001 Mars Odyssey spacecraft shows a storm front over the extensive dune field which surrounds part of the polar cap.
Spring storms are common near the north pole. This image captured by NASA's 2001 Mars Odyssey spacecraft shows a storm front over the extensive dune field which surrounds part of the polar cap.

Storm Front

This image from NASA's Mars Odyssey shows an unnamed channel located on the margin of Elysium Planitia and the Elysium volcanic complex.
This image from NASA's Mars Odyssey shows an unnamed channel located on the margin of Elysium Planitia and the Elysium volcanic complex.

Elysium Planitia

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

This schematic shows the atomic structure of the smallest units that make up the layers and interlayer region of clay minerals. This structure is similar to the clay mineral in drilled rock powder collected by NASA's Curiosity Mars rover.
This schematic shows the atomic structure of the smallest units that make up the layers and interlayer region of clay minerals. This structure is similar to the clay mineral in drilled rock powder collected by NASA's Curiosity Mars rover.

Clay Mineral Structure Similar to Clays Observed in Mudstone on Mars

This observation from NASA's Mars Reconnaissance Orbiter shows what is called a 'scalloped terrain,' that appears here to merge in a linear depression.
This observation from NASA's Mars Reconnaissance Orbiter shows what is called a 'scalloped terrain,' that appears here to merge in a linear depression.

Aligned Scallops

This image captured by NASA's 2001 Mars Odyssey spacecraft shows a landslide deposit in Ganges Chasma.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows a landslide deposit in Ganges Chasma.

Ganges Chasma

This image from NASA's 2001 Mars Odyssey spacecraft shows a portion of the floor of Crommelin Crater. This crater contains a large mound of material that filled a large part of the crater and has been subsequently eroded.
This image from NASA's 2001 Mars Odyssey spacecraft shows a portion of the floor of Crommelin Crater. This crater contains a large mound of material that filled a large part of the crater and has been subsequently eroded.

Crommelin Crater

NASA's Mars Odyssey spacecraft captured this image of dunes located in Aonia Terra.
NASA's Mars Odyssey spacecraft captured this image of dunes located in Aonia Terra.

Dunes in Aonia Terra

North polar troughs are the typical location to see evidence of strong polar surface winds. This image captured by NASA's 2001 Mars Odyssey shows 'streamers' of clouds created by catabatic winds.
North polar troughs are the typical location to see evidence of strong polar surface winds. This image captured by NASA's 2001 Mars Odyssey shows 'streamers' of clouds created by catabatic winds.

Polar Winds

This image taken by NASA's Mars Reconnaissance Orbiter shows a series of parallel layers eroding into peculiar knobs and hills.
This image taken by NASA's Mars Reconnaissance Orbiter shows a series of parallel layers eroding into peculiar knobs and hills.

Reading the Geologic Record

On Feb. 19, 2005, NASA's Mars Exploration Rover Opportunity set a one-day distance record for martian driving; Opportunity rolled 177.5 meters (582 feet) across the plain of Meridiani. 3-D glasses are necessary to view this image.
On Feb. 19, 2005, NASA's Mars Exploration Rover Opportunity set a one-day distance record for martian driving; Opportunity rolled 177.5 meters (582 feet) across the plain of Meridiani. 3-D glasses are necessary to view this image.

Record Drive Day, Opportunity Sol 383 (3-D)

Dynamic Albedo of Neutrons (DAN), measures the flow of neutrons with different energy levels returning from the ground, and their delay times, as an indication of the amount and depth of hydrogen in the ground beneath the NASA's rover, Curiosity.
Dynamic Albedo of Neutrons (DAN), measures the flow of neutrons with different energy levels returning from the ground, and their delay times, as an indication of the amount and depth of hydrogen in the ground beneath the NASA's rover, Curiosity.

Russian Hydrogen-Checking Instrument on Curiosity Fires 2 Millionth Pulse

These dunes are moving along the hard volcanic surface Nili Patera in Syrtis Major. This image was captured by NASA's Mars Odyssey.
These dunes are moving along the hard volcanic surface Nili Patera in Syrtis Major. This image was captured by NASA's Mars Odyssey.

Nili Patera Dunes

This image captured by NASA's Mars Odyssey shows parts of two giant gully that are located on the southern side of Ius Chasma. Ius Chasma has the largest number of mega gullies of any of the chasmata that make up Valles Marineris.
This image captured by NASA's Mars Odyssey shows parts of two giant gully that are located on the southern side of Ius Chasma. Ius Chasma has the largest number of mega gullies of any of the chasmata that make up Valles Marineris.

Ius Chasma Mega Gullies

This subtle, unnamed channel is located in northern Terra Cimmeria as seen by NASA's Mars Odyssey.
This subtle, unnamed channel is located in northern Terra Cimmeria as seen by NASA's Mars Odyssey.

Channel in Terra Cimmeria

A sandsheet with dune forms covers most of the floor of this unnamed crater within Coprates Chasma in this image captured by NASA's Mars Odyssey on June 23, 2010.
A sandsheet with dune forms covers most of the floor of this unnamed crater within Coprates Chasma in this image captured by NASA's Mars Odyssey on June 23, 2010.

Dunes Within Coprates Chasma

This image, taken by NASA's 2001 Mars Odyssey spacecraft, shows a large landslide deposit in an unnamed crater southwest of Holden Crater.
This image, taken by NASA's 2001 Mars Odyssey spacecraft, shows a large landslide deposit in an unnamed crater southwest of Holden Crater.

Landslide Southwest of Holden Crater

This image from NASA's 2001 Mars Odyssey shows a delta deposit on the floor of Holden Crater. This delta was formed by small channels dissecting the rim of the crater, rather than the influx of material from Uzboi Vallis.
This image from NASA's 2001 Mars Odyssey shows a delta deposit on the floor of Holden Crater. This delta was formed by small channels dissecting the rim of the crater, rather than the influx of material from Uzboi Vallis.

Holden Crater Delta

This image, taken by NASA's Mars Odyssey, shows a short section of Nirgal Vallis. Several tributaries are visible in this image.
This image, taken by NASA's Mars Odyssey, shows a short section of Nirgal Vallis. Several tributaries are visible in this image.

Nirgal Vallis

The High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter captured this image of spider-shaped features on Mars, carved by vaporizing dry ice.
The High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter captured this image of spider-shaped features on Mars, carved by vaporizing dry ice.

Radial Channels Carved by Dry Ice

NASA's 2001 Mars Odyssey image shows part of Ophir Chasma. Note the landslide deposits near the top of the image.
NASA's 2001 Mars Odyssey image shows part of Ophir Chasma. Note the landslide deposits near the top of the image.

Ophir Chasma

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