Created from over 100 images of Mars taken by Viking Orbiters in the 1970s, this composite photo by NASA shows Planet Mars as seen on Tuesday, July 31, 2018. (Click image to enlarge)
Created from over 100 images of Mars taken by Viking Orbiters in the 1970s, this composite photo by NASA shows Planet Mars as seen on Tuesday, July 31, 2018. (Click image to enlarge)
