Across nearly every continent on Earth we can find similar remarkable stone structures of unexplainable engineering feats. Might the building of these megalithic sites have been directed by an extraterrestrial hand, as Ancient Astronaut theorists have long proposed? From the curious discoveries made at the Great Pyramid, at Teotihuacan and Stone Henge, new evidence may suggest that these structures are not only connected, but also part of a more profound--and powerful--network.

Thousands of UFO sightings are reported in the United States every year, and intriguingly many of them center around U.S. military operations. Might extraterrestrials have a special interest in the country's warfare capabilities? Recently, the United States government has officially acknowledged that it is investigating unidentified aerial phenomena. What secrets have been kept from the public--and even some U.S. Presidents? And what role does the public play in demanding answers to our questions about extraterrestrials?