NASA’s Curiosity rover has made a groundbreaking discovery in Gale Crater, revealing intricate boxwork patterns that suggest ancient water activity beneath the Martian surface. These formations, resembling crumbling curbs, indicate that groundwater once percolated through the rock, leaving behind mineral-filled cracks that offer a glimpse into Mars’ ancient climate history. The rover’s findings may provide crucial insight into the mysterious transformation of Mars’ surface into a chilly desert, with implications for the possibility of past microbial life.