Archaeologists Find Hundreds of Ancient Glyphs in the Amazon

The geometric earthwork structures, carved into the ground with embankments and ditches, are in some cases more than 2,500 years old, researchers said.

By Alan Yuhas · The New York Times – World

The geometric earthwork structures, carved into the ground with embankments and ditches, are in some cases more than 2,500 years old, researchers said.