A file photo shows an aerial view of The Pyramid of the Moon at Mexico's Teotihuacan archeological ruins in this photo taken September 2, 2004. A discovery of a tomb filled with decapitated bodies suggests that Mexico's Pyramid of the Moon may have been the site of terrifyingly gory sacrifices according to archeologists excavating the site. NO RIGHTS CLEARANCES OR PERMISSIONS ARE REQUIRED FOR THIS IMAGE. REUTERS/Henry Romero/Files HR