In the spring of 2024, a comet or asteroid the size of a small building struck the Moon, carving a 730-foot wound into its ancient surface — a collision so rare it may happen only once in a century. The scar went unnoticed for two years, until a NASA researcher, reviewing orbital imagery, recognized it for what it was: the largest newly formed crater yet found anywhere in the solar system. Named McGetchin, this fresh mark on the Moon arrives at a moment when humanity is preparing to return there, transforming a geological curiosity into a practical lesson about the forces that shape worlds.