A new analysis of hundreds of obsidian artifacts from the Aztec Empire has revealed the vast trade networks that supplied ...

Researchers analyzed 788 obsidian artifacts from Tenochtitlan, revealing that the Mexica (Aztec) Empire sourced this important material from at least eight different locations, including regions ...

In the Peruvian Andes, thousands of years ago, humans were making liberal use of psychoactive drugs. We know this for a fact: ...