"When we see features like this in sediment on Earth, these minerals are often the byproduct of microbial metabolisms that are consuming organic matter."

In July 2024, NASA’s Perseverance rover extracted a rock core from the edge of Neretva Vallis, a river valley cut into the Martian surface by water rushing into the Jezero Crater billions of years ago. This mysterious rock caught the attention of scientists on Earth, as its features may reveal clues about possible ancient life on the Red Planet.