Chrystal's on Mars

"For nearly 10 years, NASA’s four-wheeled robot has been climbing the foothills of Mount Sharp, a tall mountain on Mars that stands above an ancient crater, uncovering mysteries with each of its layers. In its latest discovery, the Martian explorer stumbled upon a field of rocks made of pure sulfur, a chemical element that could hold precious clues to the Red Planet’s watery past." https://gizmodo.com/nasas-curiosity-rover-uncovers-trove-of-yellow-crystals-on-mars-2000476772