“Nobody has totally figured out” the exact purpose or meaning of the geoglyphs, which may have astronomically related forms, said Anna Roosevelt, a professor of anthropology at the University of Illinois Chicago, who was not on the team.
Archaeologists Find Hundreds of Ancient Glyphs in the Amazon (Gift Article)The geometric earthwork structures, carved into the ground with embankments and ditches, are in some cases more than 2,500 years old, researchers said.www.nytimes.com