Few things capture the public's curiosity like Area 51. The top-secret military base (which doesn't officially exist) has been the subject of conspiracy theories for decades. What actually went on there? Something tells us we'll never know for sure. However, a recently revealed series of photographs provides some tantalizing new clues.
The photos, which were published by National Geographic, show a titanium A-12 spy plane. In one image, the satisfyingly sci-fi-looking plane hangs upside down while it is prepared for radar testing. In another shot, a group of officials with heavy equipment "remove all traces of the A-12 spy plane" after it went down in the Utah desert in 1963.
Roadrunners Internationale via Pangloss Films
See more Area 51 photos at National Geographic
Of course, the photos don't prove that alien life exists--but they do go a long way toward proving the government wasn't exactly forthcoming with what was going on at Area 51. Cue the "X-Files" theme song.