Plot Summary:Enormous manmade caves... Unexplainable structures... And underwater discoveries that challenge everything we know about the past...Is it possible that an advanced civilization inhabited Earth thousands of years ago?
Robert Clotworthy,Giorgio A. Tsoukalos,David Childress,Robert R. Cargill,Michael Cremo,Erich Von Däniken,George Noory,Sara Seager,Robert Bauval,Philip Coppens