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This mosaic of images from the navigation camera on NASA's Mars Exploration Rover Opportunity shows a terrain that includes light-toned bedrock and darker ripples of wind-blown sand.
This mosaic of images from the navigation camera on NASA's Mars Exploration Rover Opportunity shows a terrain that includes light-toned bedrock and darker ripples of wind-blown sand.

Opportunity's Eastward View After Sol 2382 Drive

On this image of the rock target 'Knorr,' color coding maps the amount of mineral hydration indicated by a ratio of near-infrared reflectance intensities measured by the Mastcam on NASA's Mars rover Curiosity.
On this image of the rock target 'Knorr,' color coding maps the amount of mineral hydration indicated by a ratio of near-infrared reflectance intensities measured by the Mastcam on NASA's Mars rover Curiosity.

Hydration Map, Based on Mastcam Spectra, for 'Knorr' Rock Target

The finely ridged material in this image captured by NASA's 2001 Mars Odyssey spacecraft are huge landslide deposits called Coprates Labes. These landslide deposits are located on the floor of Coprates Chasma.
The finely ridged material in this image captured by NASA's 2001 Mars Odyssey spacecraft are huge landslide deposits called Coprates Labes. These landslide deposits are located on the floor of Coprates Chasma.

Coprates Labes

Many surface lava flows on the flanks of Olympus Mons are confined to narrow channels, like the ones in today's image from NASA's Mars Odyssey.
Many surface lava flows on the flanks of Olympus Mons are confined to narrow channels, like the ones in today's image from NASA's Mars Odyssey.

Olympus Mons Flows

This false color image from NASA's 2001 Mars Odyssey spacecraft shows many areas of dunes and sand sheets with dune forms between hills in this region west of Argyre Planitia.
This false color image from NASA's 2001 Mars Odyssey spacecraft shows many areas of dunes and sand sheets with dune forms between hills in this region west of Argyre Planitia.

Dunes near Argyre - False Color

This graphic illustration shows NASA's Curiosity Mars rover in Gale Crater, near the Red Planet's equator.
This graphic illustration shows NASA's Curiosity Mars rover in Gale Crater, near the Red Planet's equator.

Now and Long Ago at Gale Crater, Mars (Illustration)

This image captured by NASA's 2001 Mars Odyssey spacecraft shows a small portion of Gigas Sulci.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows a small portion of Gigas Sulci.

Gigas Sulci

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 plains of Terra Cimmeria.
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 plains of Terra Cimmeria.

Terra Cimmeria - 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 Capri Mensa.
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 Capri Mensa.

Capri Mensa - 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 a region of chaos in Eos 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 a region of chaos in Eos Chasma.

Chasma Chaos - False Color

The steep sided depression in this image captured by NASA's 2001 Mars Odyssey spacecraft is Shalbatana Vallis, a channel located in Xanthe Terra.
The steep sided depression in this image captured by NASA's 2001 Mars Odyssey spacecraft is Shalbatana Vallis, a channel located in Xanthe Terra.

Shalbatana Vallis

This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of Mawrth Valles, a channel carved by giant floods billions of years ago.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of Mawrth Valles, a channel carved by giant floods billions of years ago.

The Martian, Part 2: Mawrth Valles

The subtle paired fractues at the bottom of this image from NASA's 2001 Mars Odyssey spacecraft are part of Sirenum Fossae. Numerous gullies at the top of the image are located on the intersection of two crater rims.
The subtle paired fractues at the bottom of this image from NASA's 2001 Mars Odyssey spacecraft are part of Sirenum Fossae. Numerous gullies at the top of the image are located on the intersection of two crater rims.

More Sirenum Fossae

This image from NASA's Mars Reconnaissance Orbiter shows exposures of deposits along the plateau just to the south of Coprates Chasma.
This image from NASA's Mars Reconnaissance Orbiter shows exposures of deposits along the plateau just to the south of Coprates Chasma.

Clays along the Coprates Chasma Plateau

The dunes in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Olympia Undae, a huge dune field near the north polar cap.
The dunes in this image captured by NASA's 2001 Mars Odyssey spacecraft are part of Olympia Undae, a huge dune field near the north polar cap.

Polar Dunes

This image shows several wind streaks in Syrtis Major Planum as seen by NASA's 2001 Mars Odyssey spacecraft.
This image shows several wind streaks in Syrtis Major Planum as seen by NASA's 2001 Mars Odyssey spacecraft.

Wind Streaks

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

Rabe Crater Dunes

This area seen by NASA's Mars Reconnaissance Orbiter is known as the Deuteronilus contact of the Isidis Basin; it has been interpreted as a possible ancient shoreline. There are also suggestions that this contact is of volcanic origin.
This area seen by NASA's Mars Reconnaissance Orbiter is known as the Deuteronilus contact of the Isidis Basin; it has been interpreted as a possible ancient shoreline. There are also suggestions that this contact is of volcanic origin.

Hints of an Ancient Shoreline in Southern Isidis Planitia

This image from NASA's Mars Odyssey spacecraft shows the southwestern floor of Gale Crater. A fairly large channel that dissects the crater rim is visible entering from the bottom of the frame and continuing northward.
This image from NASA's Mars Odyssey spacecraft shows the southwestern floor of Gale Crater. A fairly large channel that dissects the crater rim is visible entering from the bottom of the frame and continuing northward.

Images of Gale #23

For scale, the Lincoln penny on the MAHLI calibration target is three-fourths inch (19 millimeters) in diameter. The calibration target is mounted on NASA's Mars rover Curiosity.
For scale, the Lincoln penny on the MAHLI calibration target is three-fourths inch (19 millimeters) in diameter. The calibration target is mounted on NASA's Mars rover Curiosity.

First Night Image of MAHLI Calibration Target in White Lighting

This is a close-up view of the northern two-thirds of one of the quadrangles (number 50) that were mapped onto the landing region of NASA's Curiosity rover; background image obtained by NASA's Mars Reconnaissance Orbiter.
This is a close-up view of the northern two-thirds of one of the quadrangles (number 50) that were mapped onto the landing region of NASA's Curiosity rover; background image obtained by NASA's Mars Reconnaissance Orbiter.

Close-up of Curiosity's Landing Region

This image from NASA's 2001 Mars Odyssey spacecraft shows a portion of Samara Valles.
This image from NASA's 2001 Mars Odyssey spacecraft shows a portion of Samara Valles.

Samara Valles

This cross-section view of underground layers near Mars' south pole is a radargram based on data from the Shallow Subsurface Radar (SHARAD) instrument on NASA's Mars Reconnaissance Orbiter.
This cross-section view of underground layers near Mars' south pole is a radargram based on data from the Shallow Subsurface Radar (SHARAD) instrument on NASA's Mars Reconnaissance Orbiter.

Cross Section of Buried Carbon-Dioxide Ice on Mars

Small channels dissect the northwestern rim of Gale Crater in this image captured by NASA's Mars Odyssey.
Small channels dissect the northwestern rim of Gale Crater in this image captured by NASA's Mars Odyssey.

Gale Crater Channels

In the winter a layer of carbon dioxide ice (dry ice) covers the north polar sand dunes as shown by NASA's Mars Reconnaissance Orbiter. In the spring the sublimation of the ice (going directly from ice to gas) causes a host of uniquely Martian phenomena.
In the winter a layer of carbon dioxide ice (dry ice) covers the north polar sand dunes as shown by NASA's Mars Reconnaissance Orbiter. In the spring the sublimation of the ice (going directly from ice to gas) causes a host of uniquely Martian phenomena.

A Burst of Spring

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