AIR & SPACE MAGAZINE Martian Thunderbird Something left its mark on Mars’ surface. NASA/JPL-Caltech/Univ. of Arizona November 20, 2013 "Martian Thunderbird" is NASA's great name for this feature on Mars. Taken by the Mars Reconnaissance Orbiter, this image shows the result of "a low-angle impact from an asteroid or comet." Image: NASA/JPL-Caltech/Univ. of Arizona NASA/JPL-Caltech/Univ. of Arizona Get the latest stories in your inbox every weekday.