A discarded piece of human engineering, adrift in the void for over a year, has written its final chapter onto the surface of the Moon — and we have read it. On August 5th, a SpaceX Falcon rocket's upper stage struck the lunar surface at 8,700 kilometres per hour, and NASA's Lunar Reconnaissance Orbiter has since returned images of the 18-metre crater it left behind. In the dark and bright streaks radiating outward like wings, scientists find not just the record of a collision, but a window into the Moon's hidden geology — a reminder that even accidents can become instruments of understanding.