The science part -

Dr. Ivan Ghezzi and Professor Ruggles were the men behind the report, which was published in the journal Science in 2007. Dr. Ghezzi had been studying for his doctorate in anthropology at Yale at the time of his discovery, and he had only been at Chankillo because he’d been studying fortresses. But then he realized that something didn’t make sense. Photo Credit: Werner Forman/Universal Images Group/Getty Images

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