In April 2024, a team of scientists and engineers from NASA, including cryosphere specialist Chad Greene, discovered an underground installation in Greenland using radar technology. The structure, known as Camp Century, was built during the Cold War in 1959 and was initially presented as a polar scientific research center. However, it was later revealed to be part of a secret U.S. military project called the Iceworm Project. This initiative aimed to construct an underground railway network and conceal nuclear missiles aimed at the Soviet Union during the height of the Cold War. Camp Century was a vast underground complex, with tunnels stretching up to three kilometers. The site included a range of facilities such as a hospital, laboratory, cinema, and chapel, designed to support up to 200 soldiers. The base was built to endure some of the harshest conditions on Earth, including temperatures as low as -57°C and wind speeds exceeding 190 km/h. Despite its military purpose, the base was officially maintained as a scientific research station to avoid suspicion. The U.S. Army abandoned Camp Century in 1967, leaving behind a massive amount of waste. This included hazardous materials such as Polychlorinated Biphenyls (PCBs), 200,000 liters of diesel fuel, 178,000 liters of low-activity coolant from a nuclear reactor, 24 million liters of wastewater, and 9,200 tons of physical debris. At the time, it was believed that the waste was safely sealed by perpetual snowfall. However, rising global temperatures have led to increased surface melting in Greenland, which could allow water to seep into the tunnels and potentially release the pollutants into the environment. Scientists warn that the ice layer protecting the waste could disappear by the end of the century, exposing the contaminants to the open air. Current efforts focus on monitoring the climate and the stability of the ice, as the technical challenges of retrieving the waste are immense. Any attempt to extract the materials carries risks, including ice fracturing and accelerating the release of pollutants. The discovery of Camp Century has raised urgent questions about the long-term environmental impact of Cold War-era military activities in polar regions.