Humans Probably Altered the Amazon 2,000 Years Earlier Than We Thought | Atlas Obscura | Link

http://www.atlasobscura.com/articles/geoglyphs-amazon-forests-humans

Leonieke autoposts, Link, WWWorld

If you go deep into the Amazon, in the Brazilian state of Acre, and you look in the right spot, you’ll eventually find lots of geoglyphs: shapes dug into the dirt that are recognizable from high above.