A September 23, 2026 post says NASA’s Perseverance detected large networks of carbon atoms in Jezero Crater’s Bright Angel mudstones. It describes carbon in both original sediment and later minerals, suggesting deposition at two different times, alongside evidence that shoreline rocks were altered by water at least three times. The account also says Curiosity photographed an extensive field of 4–8 cm polygonal fractures at Mount Sharp, though the network’s origin remains uncertain. The post emphasizes that the carbon can form through biological or nonbiological processes, so its presence does not establish past life.