“Many are formations that archaeologists call geoglyphs and date from between 600 B.C. to 850 A.D. All of them add to evidence contradicting the depiction of the Amazon as a largely untouched expanse before the arrival of Europeans in the 15th century.”
alan yuhashundreds of ancient geoglyphs found in the Amazon www.nytimes.com/2026/07/31/w...