How Cold War Spy Satellites Revealed 10,000 Lost Cities and Ruins

CORONA was the codename for the United States' first photographic spy satellite mission. For 12 years, it brought back intel on the USSR, China, and the Middle East. But that wasn't all its grainy, black and white images captured—it turns out it also caught an incredible number of undiscovered ancient settlements. » 4/25/14 3:25pm 4/25/14 3:25pm