The first full-scale archaeological investigation of the area took place in 1941, when Gordon R. Willey and John M. Corbett of Harvard worked at Aspero, a salt marsh at the mouth of the Supe. They found a big trash heap and a multiroomed building with no pottery and a few maize cobs under the pounded clay floor. They didn’t know what to make of it. Why was there no pottery, when all previously examined large settlements in Peru had pottery? Why only a handful of maize cobs in the whole site, when maize, at least for the elite, was a staple food? How did they grow maize in a salt marsh, anyway?
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