This image in the Cydnus Rupes region of northern Utopia Planitia is an excellent example of the rock and boulder strewn landscapes common to the northern plains of Mars   Boulder Strewn Plain in Northern Utopia Planitia

This image in the Cydnus Rupes region of northern Utopia Planitia is an excellent example of the rock and boulder strewn landscapes common to the northern plains of Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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This image reveals meter-scale (yard-scale) surface textures of mesas and knobs in the Aureum Chaos region of Mars   Mesas in Aureum Chaos

This image reveals meter-scale (yard-scale) surface textures of mesas and knobs in the Aureum Chaos region of Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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This image covers the northern edge of the largest volcano in the solar system, Olympus Mons on Mars   Collapsing Volcano: Edge of Olympus Mons

This image covers the northern edge of the largest volcano in the solar system, Olympus Mons on Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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The High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter recorded this image on March 4, 2010 of Samara Valles, one of the longest ancient valley systems on Mars   Dunes on Floor of Samara Valles, Mars

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter recorded this image on March 4, 2010 of Samara Valles, one of the longest ancient valley systems on Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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This image shows a portion of the floor in Palos Crater on equatorial Mars   Deposits on the Floor of Palos Crater

This image shows a portion of the floor in Palos Crater on equatorial Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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This image covers some high-standing topography just outside the rim of an impact crater about 30 kilometers (19 miles) in diameter near a Martian hill named Zephyria Tholus   Dust-Mantled Topography near Zephyria Tholus

This image covers some high-standing topography just outside the rim of an impact crater about 30 kilometers (19 miles) in diameter near a Martian hill named Zephyria Tholus. Image Credit: NASA/JPL-Caltech/University of Arizona

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The terrain in this image lies in the Deuteronilus Mensae region along the highland-lowland dichotomy boundary in the northern hemisphere of Mars.   Lobate Debris Apron in Deuteronilus Mensae

The terrain in this image lies in the Deuteronilus Mensae region along the highland-lowland dichotomy boundary in the northern hemisphere of Mars. Image Credit: NASA/JPL-Caltech/University of Arizona

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Just as with the ice sheet in Greenland this Martian ice sheet contains many layers that record variations in the Martian climate   Icy Layers and Climate Fluctuations near the Martian North Pole

Just as with the ice sheet in Greenland this Martian ice sheet contains many layers that record variations in the Martian climate. Image Credit: NASA/JPL-Caltech/University of Arizona

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