Curiosity rover makes new discoveries on Mars

By Ashley Strickland, CNN

Updated 1655 GMT (0055 HKT) August 6, 2019

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This artist's illustration shows the ExoMars Trace Gas Orbiter as it orbits Mars. The orbiter detected a layer of glowing green oxygen in Mars' atmosphere.
Photos: The best moments on Mars
This artist's illustration shows the ExoMars Trace Gas Orbiter as it orbits Mars. The orbiter detected a layer of glowing green oxygen in Mars' atmosphere.
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NASA's Curiosity Mars rover took a selfie shortly before completing its steepest climb yet on Mars up the Greenheugh Pediment, which tilted the rover 31 degrees.
Photos: The best moments on Mars
NASA's Curiosity Mars rover took a selfie shortly before completing its steepest climb yet on Mars up the Greenheugh Pediment, which tilted the rover 31 degrees.
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NASA's Curiosity rover captured its highest-resolution panorama, including more than a thousand images and 1.8 billion pixels, of the Martian surface between November 24 and December 1, 2019.
Photos: The best moments on Mars
NASA's Curiosity rover captured its highest-resolution panorama, including more than a thousand images and 1.8 billion pixels, of the Martian surface between November 24 and December 1, 2019.
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The cloud in the center of the image is actually a dust tower that occurred in 2010 and was captured by the Mars Reconnaissance Orbiter. The blue and white clouds are water vapor.
Photos: The best moments on Mars
The cloud in the center of the image is actually a dust tower that occurred in 2010 and was captured by the Mars Reconnaissance Orbiter. The blue and white clouds are water vapor.
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This perspective of Mars' Valles Marineris hemisphere from July 9, 2013, is actually a mosaic comprising 102 Viking Orbiter images. At the center is the Valles Marineris canyon system, over 2,000 kilometers long and up to 8 kilometers deep.
Photos: The best moments on Mars