Aztec priests used razor-sharp obsidian blades to cut open sacrificial victims, offering their still-beating hearts to the gods before tossing their bodies down the steps of Templo Mayor.

One of the premier throwing weapons of the Indian Subcontinent, the Chakram is a sharpened disc-like ring with a dull edge on the inside that allows it to be spun on a finger to gather velocity before ...

Researchers have determined that an obsidian mirror believed to have been owned by the sixteenth-century English polymath John Dee originated in the Aztec world. Dee served as a scientific adviser ...