NASA's Mars Reconnaissance Orbiter has been observing Mars since 2006, enabling it to document many types of changes, such as the way winds alter the appearance of this recent impact site. The orbiter's HiRISE camera took the four images used in this animated sequence in 2007, 2008, 2010 and 2012. Credits: NASA/JPL-Caltech/Univ. of Arizona #NASA #Mars #JourneyToMars #MarsMonday