A Dec. 13, 2014, image from the High Resolution Imaging Science Experiment (HiRISE) camera orbiting Mars shows NASA's Curiosity Mars rover on the rover's walkabout examination of the "Pahrump Hills" outcrop.

The outrcrop forms part of the basal layer of Mount Sharp inside Mars' Gale Crater.

Since landing in Gale Crater in 2012, Curiosity has been examining evidence about ancient wet environments.

HiRISE is one of six instruments with which NASA's Mars Reconnaissance Orbiter has been studying Mars since 2006.

Quelle: NASA