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Multiple dune fields surround the north polar cap. This image from NASA's 2001 Mars Odyssey spacecraft shows an unnamed region of dunes located between Olympia Undae and Abalos Undae.
Multiple dune fields surround the north polar cap. This image from NASA's 2001 Mars Odyssey spacecraft shows an unnamed region of dunes located between Olympia Undae and Abalos Undae.

North Polar Dunes

Two dark, rimless pits are located to the northwest of Ascraeus Mons in the Tharsis volcanic region of Mars in this image from NASA's Mars Reconnaissance Orbiter. They are situated in the midst of a wispy, dark, boomerang-shaped deposit.
Two dark, rimless pits are located to the northwest of Ascraeus Mons in the Tharsis volcanic region of Mars in this image from NASA's Mars Reconnaissance Orbiter. They are situated in the midst of a wispy, dark, boomerang-shaped deposit.

Dark Rimless Pits in the Tharsis Region

This fracture system, located southwest of Elysium Mons, is called Elysium Chasma. NASA's Mars Odyssey captured this image on Sept. 15, 2010.
This fracture system, located southwest of Elysium Mons, is called Elysium Chasma. NASA's Mars Odyssey captured this image on Sept. 15, 2010.

Elysium Chasma

The fractures in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Labeatis Fossae. The large impact crater was formed after the fractures.
The fractures in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Labeatis Fossae. The large impact crater was formed after the fractures.

Labeatis Fossae

This image of Terra Cimmeria taken by NASA's 2001 Mars Odyssey shows channeling and dunes near Herschel Crater.
This image of Terra Cimmeria taken by NASA's 2001 Mars Odyssey shows channeling and dunes near Herschel Crater.

Terra Cimmeria Dunes

At the center of this view of an area of mid-latitude northern Mars, a fresh crater about 6 meters (20 feet) in diameter holds an exposure of bright material, blue in this false-color image observed by NASA's Mars Reconnaissance Orbiter.
At the center of this view of an area of mid-latitude northern Mars, a fresh crater about 6 meters (20 feet) in diameter holds an exposure of bright material, blue in this false-color image observed by NASA's Mars Reconnaissance Orbiter.

Exposed Ice in a Fresh Crater

This imagery is being released in association with NASA's Mars Science Laboratory mission. This is a temporary caption to be replaced as soon as more information is available.
This imagery is being released in association with NASA's Mars Science Laboratory mission. This is a temporary caption to be replaced as soon as more information is available.

Rover Takes Its First 'Steps'

This image shows NASA's Opportunity's climb out of Victoria crater. It is the first frame of a movie that spans three days when the rover exited the crater at the alcove called
This image shows NASA's Opportunity's climb out of Victoria crater. It is the first frame of a movie that spans three days when the rover exited the crater at the alcove called

Opportunity's Wheel Tracks at Victoria Crater

The fractures in this image taken by NASA's 2001 Mars Odyssey spacecraft are part of Cerberus Fossae.
The fractures in this image taken by NASA's 2001 Mars Odyssey spacecraft are part of Cerberus Fossae.

Cerberus Fossae

This frame from an animation simulates a fly-around look at one of the places on Mars where dark streaks advance down slopes during warm seasons, possibly involving liquid water. This image is from NASA's Mars Reconnaissance Orbiter.
This frame from an animation simulates a fly-around look at one of the places on Mars where dark streaks advance down slopes during warm seasons, possibly involving liquid water. This image is from NASA's Mars Reconnaissance Orbiter.

Animation of Site of Seasonal Flows in Hale Crater, Mars

NASA's Curiosity Mars rover used the Dust Removal Tool on its robotic arm to brush aside reddish, more-oxidized dust, revealing a gray patch of less-oxidized rock material at a target called 'Bonanza King,' visible from the rover's Mastcam.
NASA's Curiosity Mars rover used the Dust Removal Tool on its robotic arm to brush aside reddish, more-oxidized dust, revealing a gray patch of less-oxidized rock material at a target called 'Bonanza King,' visible from the rover's Mastcam.

Curiosity's Brushwork on Martian 'Bonanza King' Target

This image shows the location of the 150-micrometer sieve screen on NASA's Mars rover Curiosity, a device used to remove larger particles from samples before delivery to science instruments.
This image shows the location of the 150-micrometer sieve screen on NASA's Mars rover Curiosity, a device used to remove larger particles from samples before delivery to science instruments.

Sifting Martian Samples

This region of arcuate (or curved) fractures is located north of Apollinaris Mons as seen by NASA's 2001 Mars Odyssey spacecraft.
This region of arcuate (or curved) fractures is located north of Apollinaris Mons as seen by NASA's 2001 Mars Odyssey spacecraft.

Arcuate Fractures

This image taken by the MAHLI camera shows a sample of basaltic rock from a lava flow in New Mexico serves as a calibration target carried on the front of NASA's Mars rover Curiosity for the rover's Canadian-made APXS instrument.
This image taken by the MAHLI camera shows a sample of basaltic rock from a lava flow in New Mexico serves as a calibration target carried on the front of NASA's Mars rover Curiosity for the rover's Canadian-made APXS instrument.

A Piece of New Mexico on Mars

This image from NASA's Mars Exploration Rover at the edge of
This image from NASA's Mars Exploration Rover at the edge of

Textures of 'Santa Maria' Crater, Sol 2476

Lycus Sulci is an extremely complex region surrounding the western and northern flanks of Olympus Mons. With a multitude of fault formed cliff faces, dark slope streaks are a common occurrence. This image was captured by NASA's Mars Odyssey.
Lycus Sulci is an extremely complex region surrounding the western and northern flanks of Olympus Mons. With a multitude of fault formed cliff faces, dark slope streaks are a common occurrence. This image was captured by NASA's Mars Odyssey.

Lycus Sulci

This image captured by NASA's 2001 Mars Odyssey spacecraft shows sand dunes on the floor of Sumgin Crater.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows sand dunes on the floor of Sumgin Crater.

Sumgin Crater Dunes

The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the interior of Coprates Chasma.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the interior of Coprates Chasma.

Coprates Chasma - False Color

The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the interior mound of material within Gale Crater.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the interior mound of material within Gale Crater.

Gale Crater - False Color

This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of the large sand sheet within Proctor Crater.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of the large sand sheet within Proctor Crater.

Proctor Crater Dunes

This image captured by NASA's 2001 Mars Odyssey spacecraft shows the southern wall of Juventae Chasma.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows the southern wall of Juventae Chasma.

Juventae Chasma

This image captured by NASA's 2001 Mars Odyssey spacecraft is located in Aeolis Mensae, east of Gale Crater.
This image captured by NASA's 2001 Mars Odyssey spacecraft is located in Aeolis Mensae, east of Gale Crater.

Yardangs

The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows a hill in Tyrrhena Terra.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows a hill in Tyrrhena Terra.

Tyrrhena Terra - False Color

This image from NASA's Mars Reconnaissance Orbiter spacecraft shows a water-carved channel. The channel pattern, called dendritic because of its tree, like branching running down over the rim of an ancient impact basin across the basin floor.
This image from NASA's Mars Reconnaissance Orbiter spacecraft shows a water-carved channel. The channel pattern, called dendritic because of its tree, like branching running down over the rim of an ancient impact basin across the basin floor.

Ancient Rivers

Located southwest of Olympus Mons, this image captured by NASA's 2001 Mars Odyssey spacecraft shows part of a complex region that has undergone several geologic processes.
Located southwest of Olympus Mons, this image captured by NASA's 2001 Mars Odyssey spacecraft shows part of a complex region that has undergone several geologic processes.

Ridges and Flows

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