500-year-old Aztec ritual offering uncovered in Mexico City

Archaeologists from Mexico's National Institute of Anthropology and History have uncovered a 500-year-old Aztec ritual offering at the Templo Mayor site in Mexico City. The discovery consists of six volcanic stone boxes containing greenstone sculptures, thousands of marine shells, copal spheres, and pendants, all forming a complete ceremonial assemblage from the reign of Emperor Moctezuma I (1440-1469).