On the edge of Mexico City's famed Zócalo plaza, next to the ruins of the Aztec sacred pyramid known as the Templo ... 21 white flint sacrificial knives painted red: the teeth and gums of the ...

Archaeologists have discovered the ruins of an 800-year-old Aztec pyramid in the heart of Mexico City that could show the ancient city is at least a century older than previously thought.

Mention an ancient city of pyramids shrouded in mystery ... Teotihuacan was a thriving urban center and religious site of the warlike Aztec Empire, but the Aztecs were not its first inhabitants.