Aztec duck-head pendants recovered from Tenochtitlán were made using volcanic glass called obsidian. - Mirsa Islas/Courtesy Proyecto Templo Mayor, INAH Hundreds of obsidian artifacts have revealed ...

The Aztecs were big fans of obsidian, and often used the razor-sharp volcanic glass to slice through the chests of human sacrifices in order to extract the still-beating heart. Such was their love of ...

The Aztec Empire once hosted an expansive trade network that brought volcanic glass to its capital from right across Mesoamerica, from coast to coast. The largest compositional study of obsidian ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. An obsidian ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Hundreds of ...

Hundreds of obsidian artifacts have revealed where the Aztecs acquired the volcanic glass they used for tools, ornamental pieces or religious objects centuries ago — and their vast trade networks ...