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Caption: A recently formed crater on Mars. This image relates to article that appeared in the 08 December 2006 issue of the journal Science, published by AAAS. The study, by Dr. Michael C. Malin, Malin Space Science Systems in San Diego, CA and colleagues, was titled "Present-Day Impact Cratering Rate and Contemporary Gully Activity on Mars."
Credit: Photo provided by NASA/JPL/MSSS, via Science-AAAS.
Usage Restrictions: Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission.