The UA-run HiRISE camera on the Mars Reconnaissance Orbiter spotted a crater that formed sometime between April 2004 and January 2010, according to UA researcher Nathan Bridges, in an interview on Space.com.
[right, HiRISE photo showing 6m or 20 ft diameter crater in center formed in the last 5 years, with a couple of square meters of water ice exposed, shown in blue in false-color image. Credit, NASA/JPL-Caltech/University of Arizona]