gully channels in a crater in the southern highlands of Mars
This image from NASA's Mars Reconnaissance Orbiter shows gully channels in a crater in the southern highlands of Mars. Image credit: NASA/JPL/University of Arizona
JPL's Sue Smrekar recounts discoveries by NASA's Mars Reconnaissance Orbiter that have provided new insights into past wet environments on Mars.

To read the blog and post comments, go to http://blogs.jpl.nasa.gov/?p=44 .

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