Scientists analysed sediments collected from several pits and discovered traces of maize pollen, plant fibres, reeds, and organic material associated with human storage and transport activities.The maize evidence was especially important because maize pollen does not naturally spread far through the wind in large quantities. Researchers say this strongly suggests crops or goods were intentionally placed inside the holes.The discovery supports the idea that the pits were connected to trade, storage, or taxation activities rather than ceremonial use.
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