What it is: A turquoise-encrusted wooden mask from the Aztec civilization Where it is from: Somewhere in Mesoamerica When it was made: Between 1400 and 1521 Related: Book of Kells: A 1,200-year ...

What really caused the collapse of the Maya civilization? Who were the Aztec, really? It’s complicated. Who were the Aztec, really? It’s complicated. Buried for 4,000 years, this ancient ...