Antigos geoglifos do nosso planeta (inclusive da Amazônia).

"Ancient Geoglyphs Around the World (PHOTOS)"
By Sean Breslin
Published Mar 11 2015 11:30 AM ED
http://www.weather.com/science/nature/news/ancient-geoglyphs-photos?utm_content=buffera4db5&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer

"Hundreds of Geoglyphs Discovered in the Amazon"

In ArchaeoBlog An archaeology web log by James Q. Jacobs

http://jqjacobs.net/archaeology/geoglyph.html

Artigos em português:

http://pt.wikipedia.org/wiki/Geoglifo

http://veja.abril.com.br/noticia/ciencia/cientistas-descobrem-novos-geoglifos-na-amazonia/