Mysterious mounds in the southwest corner of the Amazon Basin were once the site of ancient urban settlements
Credit: Roland Seitre/Nature Picture Library
“This is the first clear evidence that there were urban societies in this part of the Amazon Basin,” says Jonas Gregorio de Souza, an archaeologist at the University Pompeu Fabra in Barcelona, Spain. It adds to a that unusually high concentrations of domesticated plants, along with patches of unusually nutrient-rich earth that could have been created by people, might indicate that ancient Amazonian inhabitants had indeed shaped their environment.hundreds of large, geometric mounds that had been uncovered by deforestation of the southern end of the Amazon rainforest.
Prümers and his colleagues took advantage of lidar in 2019 when they flew a helicopter equipped with the technology over six areas near sites confirmed to have been occupied by the Casarabe people. The team got more than it bargained for, with lidar revealing the size and shape of 26 settlements, including 11 the researchers hadn’t been looking for — a monumental task that would have taken 400 years to survey by conventional means, Prümers says.
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