Strange nodules of unusual minerals found on speckled rocks on Mars have offered more tantalizing clues that ancient life may have once thrived on the now-dead planet, NASA says.
NASA's Perseverance rover found one such arrow-shaped rock, nicknamed Cheyava Falls, in 2024 along the northern bank of Neretva Vallis, the dried-up remnants of an ancient river that once rushed into Mars' Jezero crater.
