The research team was surprised by the variety of obsidian types found in the ancient capital, which surpasses that found at other sites in Mesoamerica. The discovery also sheds light on how the Aztec ...

But after the Aztec Empire defeated the Tepanecs from Azcapotzalco and began imperial expansion in 1430, obsidian types increased, showing how the Mexicas expanded their commercial networks ...

The research team was surprised by the variety of obsidian types found in the ancient capital, which surpasses that found at other sites in Mesoamerica. The discovery also sheds light on how the ...

CNN — 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 ...