Aerial view showing pyramid of the Moon at Mexico's Teotihuacan archeological ruins.
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. . REUTERS/Henry Romero/Files HR