A rock containing many smaller round stones could indicate that there was once a large amount of liquid water on the Red Planet.

NASA’s Mars Reconnaissance Orbiter captured an image of the Curiosity rover driving through the Gale Crater. The spacecraft entered Mars’ orbit in 2006 and could continue to operate through 2029.

Captured by the Orbiter's High-Resolution Imaging Science Experiment (HiRISE) camera, the shot was taken on February 28 this year; this was the 4,455th day of Curiosity's mission after it touched down on Mars on August 6, 2012.