On the inner rim of Mars' Jezero Crater, NASA's Perseverance rover has found that water did not visit once and leave — it returned, transformed, and departed in at least three distinct episodes across deep geological time. What orbital images read as a simple lakebed deposit has revealed itself, upon close examination, to be a layered archive of groundwater seepage, ancient lake chemistry, and hydrothermal circulation. Each encounter left its signature in altered minerals, and those signatures carry the same chemical logic that, on Earth, sustains microbial life. Mars, it seems, was not merely