In April 2024, NASA scientists flying over northern Greenland spotted something unexpected. Using their advanced UAVSAR radar system on a Gulfstream III aircraft, they detected strange patterns beneath the ice east of Pituffik Space Base. The signals did not match natural ice layers. After careful analysis, researchers matched the shapes to Camp Century—a US military base built under Greenland’s ice in 1959 during the Cold War. Camp Century was carved about eight meters below the surface to house tunnels, living spaces, and labs. At its peak, up to 200 people lived there, powered by a portable nuclear reactor. The base was part of Project Iceworm, a plan to hide nuclear missiles beneath the ice. But the ice sheet shifted faster than expected, causing the project to be abandoned by the 1960s. The camp closed fully in 1967 and was left buried by continuous snowfall. Now its remains lie at least 30 meters deep. New radar images provide a clearer, 3D look at the base’s tunnel layout. Scientists say the discovery is more than a cool find; it highlights the Greenland Ice Sheet’s changing nature. Ice loss in Greenland has accelerated since the 1990s, raising questions about what might happen to old structures and waste left in the ice, including low-level radioactive materials. While there is no immediate risk, researchers are watching closely. This detection was an accidental bonus during tests of NASA’s radar system, designed to map ice thickness. It helps improve methods used to study ice sheets on Earth and monitor rising sea levels. For now, Camp Century remains a hidden time capsule frozen deep in the Greenland ice, quietly resurfacing in new data.