Scientists took more than 300 pottery shards from the ancient Aztec city of Teotihuacan and ground them into a powder in order to better study what the pottery contained. After scanning the powder from the pottery shards, they found traces of food and drink that were absorbed by the pottery. Fourteen of the shards contained conclusive chemical evidence of ingredients for making pulque, a drink made from the fermenting the sap of the agave plant. Pulque was possibly important to the Aztecs for providing needed calories, pro-biotic bacteria, and essential nutrients.
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