Billions of years before Mars became the barren world we observe today, water moved through Jezero Crater in ways far more intricate than science had imagined — not merely pooling on the surface, but circulating through rock and soil in layered, interconnected systems. NASA's Perseverance rover, patiently reading the mineral record embedded in ancient olivine-rich rocks, has uncovered evidence of this complex hydrology, prompting researchers at Purdue University and beyond to revise their understanding of early Martian conditions. The discovery does not confirm life, but it deepens the case th