A bizarre blacked-out structure in Antarctica has sparked a frenzy of debate about a possible top-secret government cover-up - or a subterranean alien base. The mysterious footage released on YouTube conspiracy page thirdphaseofmoon showed a row of identical structures lined up in Antartica on Google Earth. The site was claimed to be located at 75° 0'46.98"S 0° 4'52.71”E coordinates.