Across a Martian valley called Valle Grande, NASA's Curiosity rover has encountered a landscape that seems to ask ancient questions in geometric form — thousands of honeycomb-shaped fractures spreading to every horizon, wrapping around rocky formations as if the planet itself were trying to preserve a record of its wetter, livelier past. Formed perhaps by drying mud, temperature cycles, or the slow compression of water-laden sediment, these polygonal patterns join fourteen years of evidence suggesting that Mars once held the conditions necessary for life. In the patient language of stone, the