Editing Pre-Columbian era (section)

===Cambeba===
{{Main|Cambeba people}}
Also known as the Omagua, Umana, and Kambeba, the Cambeba are an [[Indigenous peoples of Brazil|indigenous people]] in Brazil's [[Amazon basin]]. The Cambeba were a populous, organized society in the late pre-Columbian era whose population suffered a steep decline in the early years of the [[Columbian Exchange]]. The Spanish explorer [[Francisco de Orellana]] traversed the [[Amazon River]] during the 16th century and reported densely populated regions running hundreds of kilometers along the river. These populations left no lasting monuments, possibly because they used local wood as their construction material as stone was not locally available. While it is possible Orellana may have exaggerated the level of development among the Amazonians, their semi-nomadic descendants have the odd distinction among tribal indigenous societies of a hereditary, yet landless, [[aristocracy]]. Archaeological evidence has revealed the continued presence of semi-domesticated orchards, as well as vast areas of land enriched with ''[[terra preta]]''. Both of these discoveries, along with Cambeba ceramics discovered within the same archaeological levels suggest that a large and organized civilization existed in the area.<ref>{{cite news |url=https://www.washingtonpost.com/wp-dyn/content/article/2010/09/03/AR2010090302302.html |title=Scientists find evidence discrediting theory Amazon was virtually unlivable |first=Juan |last=Forero |newspaper=[[Washington Post]] |date=5 September 2010}}</ref>