On May 30, NASA’s Curiosity Mars rover uncovered yellow sulfur crystals on the Red Planet, surprising scientists exploring a region rich with sulfates. Unlike past detections of sulfur-based minerals, this discovery was of elemental sulfur, which is odorless and forms in unique conditions not associated with the area’s history. The rover found a significant amount of elemental sulfur in bright rocks, indicating past activity such as energetic floods and boulder-rich flows. Despite the inability to sample the sulfur rocks, Curiosity successfully drilled a 41st hole in a large rock nicknamed “Mammoth Lakes” for further analysis. The mission continues to uncover surprising complexities on Mars.
https://www.jpl.nasa.gov/news/nasas-curiosity-rover-discovers-a-surprise-in-a-martian-rock