Pre-Hispanic figures of rattlesnakes are displayed as part of the "Teotihuacan, City of Gods" exhibition in Mexico City's anthropology museum May 21, 2009. The snakes are representations of Quetzalcoatl, the feathered serpent, one of the most common deities in Teotihuacan. This god has powers related to soil fertility and crop growth. The exhibition is the result of a century of exploration and research, with more than 400 pieces that will be on display until August 29, according to the National Institute of Anthropology and History. Picture taken May 21, 2009. REUTERS/Henry Romero (MEXICO SOCIETY)