Curiosity rover is crushing it: ran over a rock and found pure sulfur The RegisterNASA’s Curiosity Rover Discovers a Surprise in a Martian Rock NASA Jet Propulsion Laboratory‘An oasis in the desert’: NASA’s Curiosity rover finds pure sulfur in Martian rocks Space.comRock crushed by Mars rover reveals crystals never before seen on Red Planet Fox Weather NASA’s Curiosity rover accidentally reveals ultra-rare sulfur crystals after crushing a rock on Mars Livescience.com