https://science.nasa.gov/photojournal/close-up-of-brushed-area-on-martian-rock-target-ekwir_1/
Close-up of Brushed Area on Martian Rock Target 'Ekwir_1' - NASA Science
Jan 7, 2013 - This image from the MAHLI camera on NASA's Mars rover Curiosity shows details of rock texture and color in an area where the rover's Dust Removal Tool (DRT)...