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

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.

NASA’s Curiosity rover just made history with its first-ever mid-drive photo snapped from orbit, captured by the HiRISE camera aboard the Mars Reconnaissance Orbiter. The image shows Curiosity trucking across the Martian surface,