Crop circles spotted on an island in the Mediterranean might not be from aliens, but from a threat closer to home: Nazis; new discoveries help experts uncover who made them and for what sinister purpose.

Adam Ruben, Alan Lester, David Krueger, Eleanor Spicer Rice, Geoffrey 'Geoff' Wawro, Guy Walters, Jennifer Lee Jellicorse, Joe Watkins, Karen Bellinger, Katie Paul, Ken Joyce, Kevin Hymel, Klint Janulis, Mallory Lindsay, Mark Horton, Martin Pepper, Rob Nelson, Roland Kays, Tracy Fanara