The research group inspected the pots and jugs and found ancient grains that had lingered inside. The grains showed evidence that they had been damaged by malting and mashing, two key steps in beer-making. Residue from inside the uncovered pots and funnels was tested with ion chromatography to find out what the ancient beer was made of. The 5,000-year-old beer “recipe” was published on Monday in the journal Proceedings of the National Academy of Sciences.
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