Excavations at the Pyramid of the Moon near Mexico City. At the tomb at Teotihuacan, the first major city built in the Americas, scientists

have uncovered a tomb filled with decapitated bodies, suggesting that it may have been the site of horrifically gory sacrifices. "It is hard to believe that the ritual consisted of clean, symbolic performances -- it is most likely that the ceremony created a horrible scene of bloodshed with sacrificed people and animals. Whether the victims and animals were killed at the site or a nearby place, this foundation ritual must have been one of the most terrifying acts recorded archeologically in Mesoamerica," said Saburo Sugiyama, one of the scientists leading the ongoing dig.