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Photos: The Search for Water on Mars

Study Suggests It Rained on Ancient Mars

ESA/DLR (E. Hauber)

The picture shows a topographic map of a crater in the Xanthe highlands, which held a lake 3.8 to 4 billion years ago. Sediments were deposited in the lake, forming a distinctly shaped delta. The lake was fed by a river that flowed through the Nanedi valley and into the crater from the south.

Signs of Underground Plumbing Seen on Mars

NASA/JPL-Caltech/Univ. of Arizona

Dense clusters of crack-like structures called deformation bands form the linear ridges in this Mars image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

Study: Mars Had Drizzle and Dew

NASA

Cracks caused by the contraction of sulfate are evident in this image of the surface of Mars' Meridiani Planum site by NASA's Opportunity Rover.

McLaughlin Crater on Mars by MRO Spacecraft

NASA/JPL-Caltech/Univ. of Arizona

This view of layered rocks on the floor of McLaughlin Crater shows sedimentary rocks that contain spectroscopic evidence for minerals formed through interaction with water. The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter recorded the image. Image released Jan. 20, 2013.

Dark Flows on Mars: NASA Images

NASA/JPL-Caltech/Univ. of Arizona

Dark, seasonal flows emanate from bedrock exposures at Palikir Crater on Mars in this image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. Three arrows point to bright, smooth fans left behind by flows. This image was taken on June 27, 2011 and released on Feb. 10, 2014. [Read the Full Story Here]

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