1,300-Year-Old Pottery Found in Colorado Contains Ancient ‘Natural Aspirin’ | Western Digs

Fragmented pottery unearthed in a rockshelter in east central Colorado has revealed traces of salicylic acid, a substance derived from willow bark that’s the natural precursor to modern-day aspirin.

Dated to the 7th century, the pottery may be the earliest known physical evidence of the chemical’s use in North America, according to archaeologists.

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