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Dark slope streaks mark the rim of this unnamed crater in Terra Sabaea, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.
Dark slope streaks mark the rim of this unnamed crater in Terra Sabaea, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Dark Slope Streaks

This set of graphs shows variation in the amount and the depth of water detected beneath NASA's Mars rover Curiosity by use of the rover's Dynamic Albedo of Neutrons (DAN) instrument at different points the rover has driven.
This set of graphs shows variation in the amount and the depth of water detected beneath NASA's Mars rover Curiosity by use of the rover's Dynamic Albedo of Neutrons (DAN) instrument at different points the rover has driven.

Variation in Water Content in Martian Subsurface Along Curiosity's Traverse

Color mosaic of Olympus Mons volcano on Mars from the Viking 1 Orbiter. The mosaic was created using images from orbit 735 taken 22 June 1978. Olympus Mons is about 600 km in diameter and the summit caldera is 24 km above the surrounding plains.
Color mosaic of Olympus Mons volcano on Mars from the Viking 1 Orbiter. The mosaic was created using images from orbit 735 taken 22 June 1978. Olympus Mons is about 600 km in diameter and the summit caldera is 24 km above the surrounding plains.

Color Mosaic of Olympus Mons

This VIS image captured by NASA's 2001 Mars Odyssey spacecraft, compared to yesterday's IR image, shows the dunes darker than their surroundings due to cooler temperature.
This VIS image captured by NASA's 2001 Mars Odyssey spacecraft, compared to yesterday's IR image, shows the dunes darker than their surroundings due to cooler temperature.

Rabe Crater Dunes

The lava flows in this image from NASA's 2001 Mars Odyssey spacecraft are part of the extensive lava plains of Daedalia Planum.
The lava flows in this image from NASA's 2001 Mars Odyssey spacecraft are part of the extensive lava plains of Daedalia Planum.

Daedalia Planum

Eroded by countless years of wind action, the material in this region of Zephyria Planum is being sculpted into yardangs -- long, thin hills separated by narrow valleys. This image was captured by NASA's Mars Odyssey.
Eroded by countless years of wind action, the material in this region of Zephyria Planum is being sculpted into yardangs -- long, thin hills separated by narrow valleys. This image was captured by NASA's Mars Odyssey.

Zephyria Planum

This image from NASA's 2001 Mars Odyssey spacecraft shows part of the extensive lava flows that make up Daedalia Planum.
This image from NASA's 2001 Mars Odyssey spacecraft shows part of the extensive lava flows that make up Daedalia Planum.

Daedalia Planum

This image captured by NASA's 2001 Mars Odyssey shows a portion of Aram Chaos.
This image captured by NASA's 2001 Mars Odyssey shows a portion of Aram Chaos.

Aram Chaos

The dunes in this image captured by NASA's Mars Odyssey are near the north polar cap.
The dunes in this image captured by NASA's Mars Odyssey are near the north polar cap.

Polar Dunes

Tempe Terra is criss-crossed with numerous fracture systems. This image from NASA's Mars Odyssey shows a region where the fractures are intersecting,
Tempe Terra is criss-crossed with numerous fracture systems. This image from NASA's Mars Odyssey shows a region where the fractures are intersecting,

Tempe Terra

This image, taken by NASA's Mars Reconnaissance Orbiter, shows the transition between the 'Murray Formation,' in which layers are poorly expressed and difficult to trace from orbit, and the hematite ridge, which is made up of continuous layers.
This image, taken by NASA's Mars Reconnaissance Orbiter, shows the transition between the 'Murray Formation,' in which layers are poorly expressed and difficult to trace from orbit, and the hematite ridge, which is made up of continuous layers.

Geological Transition

The channels in this image captured by NASA's 2001 Mars Odyssey spacecraft show draining from Coracis Fossae toward Bosporos Planum.
The channels in this image captured by NASA's 2001 Mars Odyssey spacecraft show draining from Coracis Fossae toward Bosporos Planum.

Channels

The parallel sides and low interior seen in this image from NASA's 2001 Mars Odyssey spacecraft are faults and down-dropped material between the faults. This tectonic feature is called a graben. The graben in this image is located in Daedalia Planum.
The parallel sides and low interior seen in this image from NASA's 2001 Mars Odyssey spacecraft are faults and down-dropped material between the faults. This tectonic feature is called a graben. The graben in this image is located in Daedalia Planum.

Graben

This graphic shows the daily variations in Martian radiation and atmospheric pressure as measured by NASA's Curiosity rover. As pressure increases, the total radiation dose decreases.
This graphic shows the daily variations in Martian radiation and atmospheric pressure as measured by NASA's Curiosity rover. As pressure increases, the total radiation dose decreases.

Daily Cycles of Radiation and Pressure at Gale Crater

The unnamed channel in this image from NASA's 2001 Mars Odyssey spacecraft is located in northern Tyrrhena Terra.
The unnamed channel in this image from NASA's 2001 Mars Odyssey spacecraft is located in northern Tyrrhena Terra.

Channel

Taken by NASA's 2001 Mars Odyssey spacecraft, this image of the northeastern flank of Ascraeus Mons shows several volcanic channels.
Taken by NASA's 2001 Mars Odyssey spacecraft, this image of the northeastern flank of Ascraeus Mons shows several volcanic channels.

Ascraeus Mons

Data from the Alpha Particle X-ray Spectrometer (APXS) instrument on NASA's Mars rover Curiosity show an unusual enrichment of silicon in the rocks dubbed 'Wildrose' and 'Bonanza King,' relative to other rocks studied at Gale Crater on Mars.
Data from the Alpha Particle X-ray Spectrometer (APXS) instrument on NASA's Mars rover Curiosity show an unusual enrichment of silicon in the rocks dubbed 'Wildrose' and 'Bonanza King,' relative to other rocks studied at Gale Crater on Mars.

Martian Rocks Rich in Silicon

The channels and linear depression in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the western margin of the Elysium Volcanic complex. The channels were created by lava flow.
The channels and linear depression in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the western margin of the Elysium Volcanic complex. The channels were created by lava flow.

Lava Channels

This image from NASA's 2001 Mars Odyssey spacecraft shows some of the extensive volcanic flows east of the large Tharsis volcanoes.
This image from NASA's 2001 Mars Odyssey spacecraft shows some of the extensive volcanic flows east of the large Tharsis volcanoes.

Tharsis Volcanics

An unnamed channel drains a high standing region in Tyrrhena Terra in this image captured by NASA's 2001 Mars Odyssey spacecraft.
An unnamed channel drains a high standing region in Tyrrhena Terra in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Channel in Tyrrhena Terra

This image from NASA's Mars Odyssey shows a small portion of two landslide deposits within Melas Chasma.
This image from NASA's Mars Odyssey shows a small portion of two landslide deposits within Melas Chasma.

Melas Chasma Landslides

Wind is one of a handful of active processes on Mars today. This image taken by NASA's 2001 Mars Odyssey of Memnonia Sulci demonstrates the power of wind in eroding and shaping the surface.
Wind is one of a handful of active processes on Mars today. This image taken by NASA's 2001 Mars Odyssey of Memnonia Sulci demonstrates the power of wind in eroding and shaping the surface.

Memnonia Sulci

This image shows lava flows that originated at Olympus Mons as seen by NASA's 2001 Mars Odyssey spacecraft.
This image shows lava flows that originated at Olympus Mons as seen by NASA's 2001 Mars Odyssey spacecraft.

Olympus Mons Lava

The volcanic flows in this image from NASA's Mars Odyssey spacecraft are at the far southwestern margin of Daedalia Planum. Notice the different appearance of this dunes compared to yesterday's image.
The volcanic flows in this image from NASA's Mars Odyssey spacecraft are at the far southwestern margin of Daedalia Planum. Notice the different appearance of this dunes compared to yesterday's image.

Volcanic Flows

Now that summer has arrived in the northern hemisphere of Mars, the dunes near the polar cap have shed all their winter frost, as shown in this image from NASA's 2001 Mars Odyssey spacecraft.
Now that summer has arrived in the northern hemisphere of Mars, the dunes near the polar cap have shed all their winter frost, as shown in this image from NASA's 2001 Mars Odyssey spacecraft.

North Polar Dunes

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