NASA's Curiosity rover has made a groundbreaking discovery on Mars by uncovering pure sulfur crystals within a broken rock.

A close-up photo taken by the Curiosity rover shows pure yellow sulfur crystals within a rock. NASA’s Curiosity rover ran over a rock on Mars in late May. That’s par for the course on the red ...

Meanwhile, the Curiosity rover turned up a surprising find of pure sulfur crystals. Both rovers are going strong, so we can look forward to more discoveries in the new year as the wheeled ...