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This image captured by NASA's 2001 Mars Odyssey spacecraft shows the edge of the clouds in a weather front in the northern latitudes.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows the edge of the clouds in a weather front in the northern latitudes.

Storm Front

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

Dark Slope Streaks

We now begin a traverse across Mt. Sharp moving from east to west. The layering of the material that comprises Mt. Sharp is visible in the bottom third of this image from NASA's Mars Odyssey spacecraft; showing the weathering that has affected Mt. Sharp.
We now begin a traverse across Mt. Sharp moving from east to west. The layering of the material that comprises Mt. Sharp is visible in the bottom third of this image from NASA's Mars Odyssey spacecraft; showing the weathering that has affected Mt. Sharp.

Images of Gale #9

This image, made by the quadrupole mass spectrometer in the SAM suite of instruments in NASA's Curiosity Mars rover. shows the ratio of the argon isotope argon-36 to the heavier argon isotope argon-38, in various measurements.
This image, made by the quadrupole mass spectrometer in the SAM suite of instruments in NASA's Curiosity Mars rover. shows the ratio of the argon isotope argon-36 to the heavier argon isotope argon-38, in various measurements.

Argon Isotopes Provide Robust Signature of Atmospheric Loss

The channel at the very top of this image captured by NASA's 2001 Mars Odyssey spacecraft is Olympica Fossae. That and the rest of the channels in this image are likely lava channels.
The channel at the very top of this image captured by NASA's 2001 Mars Odyssey spacecraft is Olympica Fossae. That and the rest of the channels in this image are likely lava channels.

Lava Channels

This image shows a small portion of the extensive lava flows created by the large Tharsis volcanoes as seen by NASA's 2001 Mars Odyssey spacecraft. These flows are located north east of Ascraeus Mons.
This image shows a small portion of the extensive lava flows created by the large Tharsis volcanoes as seen by NASA's 2001 Mars Odyssey spacecraft. These flows are located north east of Ascraeus Mons.

Tharsis Lava Flows

This graph shows about one-fourth of a Martian year's pattern atmospheric pressure at the surface of Mars, as measured by the Rover Environmental Monitoring Station on NASA's Curiosity rover.
This graph shows about one-fourth of a Martian year's pattern atmospheric pressure at the surface of Mars, as measured by the Rover Environmental Monitoring Station on NASA's Curiosity rover.

Seasonal Pressure Curve Peaks at Gale Crater

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 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

A Martian target rock called 'Nova,' shown here, displayed an increasing concentration of aluminum as a series of laser shots from NASA's Curiosity Mars rover penetrated through dust on the rock's surface.
A Martian target rock called 'Nova,' shown here, displayed an increasing concentration of aluminum as a series of laser shots from NASA's Curiosity Mars rover penetrated through dust on the rock's surface.

Curiosity's ChemCam Examines Mars Rock Target 'Nova'

The group of hills in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of a large unnamed depression in northern Arabia Terra.
The group of hills in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of a large unnamed depression in northern Arabia Terra.

Hills

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

The channel in this image captured by NASA's 2001 Mars Odyssey spacecraft is a portion of Hrad Vallis.
The channel in this image captured by NASA's 2001 Mars Odyssey spacecraft is a portion of Hrad Vallis.

Hrad Vallis

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

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