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NASA's Mars Exploration Rover Opportunity inspected this mineral vein, called "Homestake," in November 2011 at the northern end of the "Cape York" section of Endeavour Crater's western rim.
'Homestake' Vein on 'Cape York,' Color Enhanced
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A rind that appears bluish in this false-color view covers portions of the surface of a rock called "Whitewater Lake" in the top half of the view from NASA's Mars Exploration Rover Opportunity.
'Whitewater Lake' Rock Viewed by Opportunity
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This self-portrait of NASA's Mars Exploration Rover Spirit is a polar projection of the 360-degree "McMurdo" panorama made from images taken by Spirit's panoramic camera (Pancam).
Spirit Mars Rover in 'McMurdo' Panorama, Polar Projection (False Color)
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This self-portrait of NASA's Mars Exploration Rover Spirit is a polar projection of the 360-degree "McMurdo" panorama made from images taken by Spirit's panoramic camera (Pancam).
Spirit Mars Rover in 'McMurdo' Panorama, Polar Projection
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This 360-degree scene, called the "McMurdo" panorama, comes from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Spirit.
Spirit Mars Rover in 'McMurdo' Panorama (False Color)
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This 360-degree view, called the "McMurdo" panorama, comes from the panoramic camera (Pancam) on NASA's Mars Exploration Rover Spirit.
Spirit Mars Rover in 'McMurdo' Panorama
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This picture shows a lab demonstration of the measurement chamber inside the Tunable Laser Spectrometer, an instrument that is part of the Sample Analysis at Mars investigation on NASA's Curiosity rover.
Shooting Lasers
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This illustration shows the locations and interactions of volatiles on Mars. Volatiles are molecules that readily evaporate, converting to their gaseous form, such as water and carbon dioxide.
Volatiles on Mars
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This graph shows the percentage abundance of five gases in the atmosphere of Mars, as measured by the Quadrupole Mass Spectrometer instrument of the Sample Analysis at Mars instrument suite on NASA's Mars rover in October 2012.
The Five Most Abundant Gases in the Martian Atmosphere
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If the atmosphere of Mars contains methane, various possibilities have been proposed for where the methane could come from and how it could disappear.
Potential Sources and Sinks of Methane on Mars
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The plot on the left shows new results from the Sample Analysis at Mars, or SAM, instrument on NASA's Curiosity rover.
Weighing Molecules on Mars
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On Sol 84 (Oct. 31, 2012), NASA's Curiosity rover used the Mars Hand Lens Imager (MAHLI) to capture this set of 55 high-resolution images, which were stitched together to create this full-color self-portrait.
High-Resolution Self-Portrait by Curiosity Rover Arm Camera
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Self-portrait of NASA's Curiosity Mars rover uses thumbnail versions of MAHLI component images to give an idea of what a sharper version will look like when the full-frame images are assembled.
Preliminary Self-Portrait of Curiosity by Rover's Arm Camera
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The Martian soil examined by the Chemistry and Mineralogy (CheMin) instrument on NASA's Curiosity rover shows the diffraction signature, or "fingerprint," of the mineral olivine, shown here on Earth in the form of tumbled crystals about a quarter-inch (several millimeters) in size.
Olivine on Earth
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This graphic shows results of the first analysis of Martian soil by the Chemistry and Mineralogy (CheMin) experiment on NASA's Curiosity rover.
First X-ray View of Martian Soil
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This pair of images from the Mast Camera on NASA's Curiosity rover shows the upper portion of a wind-blown deposit dubbed "Rocknest."
Wind-Blown Martian Sand
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This pair of images shows a "bite mark" where NASA's Curiosity rover scooped up some Martian soil (left), and the scoop carrying soil.
Curiosity Digs In
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This pair of images shows a "bite mark" where NASA's Curiosity rover scooped up some Martian soil (left), and the scoop carrying soil.
Curiosity Digs In (Annotated)
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This image shows the cells that hold the soil samples that are vibrated by the Chemistry and Mineralogy (CheMin) instrument on NASA's Curiosity rover.
Shake it up, CheMin
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This charged couple device (CCD) is part of the Chemistry and Mineralogy (CheMin) instrument on NASA's Curiosity rover.
Detector for CheMin
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A conventional X-ray diffraction instrument (left) is the size of a large refrigerator, in contrast to the compact size of the Chemistry and Mineralogy (CheMin) instrument on NASA's Curiosity rover (top right) and the spin-off commercial portable instrument (lower right, orange case).
X-ray Diffraction, Big and Small
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This focus-merge image from the Mars Hand Lens Imager (MAHLI) on the arm of NASA's Mars rover Curiosity shows a rock called "Burwash." The rock has a coating of dust on it. The coarser, visible grains are windblown sand.
Rock 'Burwash' Near Curiosity, Sol 82
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The Mars Hand Lens Imager (MAHLI) on the arm of NASA's Mars rover Curiosity took this image of a rock called "Et-Then" during the mission's 82nd sol, or Martian day (Oct. 29, 2012.)
Rock 'Et-Then' Near Curiosity, Sol 82
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Sample material from the fourth scoop of Martian soil collected by NASA's Mars rover Curiosity is on the rover's observation tray in this image taken during the mission's 78th Martian day, or sol, (Oct. 24, 2012) by Curiosity's left Navigation Camera.
Scooped Material on Rover's Observation Tray
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The Chemistry and Camera (ChemCam) instrument on NASA's Mars rover Curiosity used its laser and spectrometers to examine what chemical elements are in a drift of Martian sand during the mission's 74th Martian day, or sol (Oct. 20, 2012).
Laser Hit on Martian Sand Target, Before and After
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