NASA Radar Reveals Cold War 'City Under The Ice' In Greenland: 'We Didn't Know What It Was'

A thermal drill is seen at Camp Century in Greenland in 1966. (Credit: National Achives via NASA)

A team of NASA scientists made an astonishing discovery while using a high-tech, airborne radar system to probe Greenland's massive ice sheet — an abandoned U.S. military base hidden 100 feet below the surface.

"We were looking for the bed of the ice and out pops Camp Century," said Alex Gardner, a cryospheric scientist at NASA's Jet Propulsion Laboratory, who helped lead the project. "We didn't know what it was at first."