starch research in Peru

A research group at University of Missouri presented their new results as the following.

News published by University of MissouriAncient Human Left Evidence From The Party That Ended 4,000 Years Ago 

Article by Science Daily
Ancient Human Left Evidence From The Party That Ended 4,000 Years Ago

I'm not sure about details because I haven't read this new paper. According to these articles, this group analysed residues on stones, pots, and sediments.

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