Enlarge / NASA’s Perseverance rover discovered “leopard spots” on a reddish rock nicknamed “Cheyava Falls” in Mars’ Jezero Crater in July 2024. (credit: NASA/JPL-Caltech/MSSS) NASA's Perseverance rover has found a very intriguing rock on the surface of Mars. An arrowhead-shaped rock observed by the rover has chemical signatures and structures that could have been formed by ancient microbial life.