Archaeologists have discovered what they believe was the gruesome scene of a royal massacre in the ancient city of Cancuén, once one of the richest cities in the Maya empire. The bones of 31 executed and dismembered Maya nobles were found in a sacred reservoir at the entrance to the royal palace in Cancuén in the Petén rain forest of Guatemala. Researchers also found a shallow grave nearby containing the skeletons of two people they believe were the king and queen. The bones of more than a dozen executed upper-class Maya were found at a third burial site north of...