Scientists Think They've Figured Out What Dozens Of Ancient Geoglyphs Might Have Been Used For
Half a millennia ago , the Qhapac Nan road scheme once stretched from New - day Ecuador to Chile . Built for foot traffic during the Inca Empire , the road feature cobblestone pavement , bedrock stairs , rope abatement Harry Bridges , and more than 90 round geoglyphs . Now , a squad of researchers believes they ’ve figured out the glyphs ’ very virtual usage : road signs ....