Archaeologists have discovered that many ancient sites were built with an acoustic purpose, and often resonate at a frequency that has a profound effect on the human brain. Could ancient people have been aware of a harmonic code? One that put them in contact with alien beings?
William Henry, Robert Clotworthy, Andrew Collins, Nick Pope, Erich von Däniken, Linda Moulton Howe, Philip Coppens, David Childress, Mike Bara, Jonathan Young, George Noory, 8 more, Nick Redfern, Robert Schoch, Michael Dennin, Hugh Newman, Giorgio A. Tsoukalos, David Wilcock, Bill Birnes, Ariel Bar Tzadok