Researchers analyzing samples from NASA’s Perseverance rover have found minerals and textures that could be linked to microbial activity on Mars. The discovery was made in a 1-mile-wide ancient river channel, where the rover drilled into sedimentary rock named “Chevaya Falls”. The findings include circular reaction fronts, small nodules, and distinct patterns of phosphate, iron, and sulfur. Two minerals, vivianite and greigite, were also identified, which are associated with iron and sulfur cycling in oxygen-poor settings. While the discovery is promising, the authors stress that it’s not conclusive proof of life on Mars and requires further analysis to rule out nonbiological sources.
Source: https://www.earth.com/news/nasa-announces-discovery-of-life-on-mars-with-high-degree-of-confidence