""Most people believe that the Amazon Rainforest is nothing but a virgin paradise of untouched wilderness. Recent studies have shown, however, that much of the Amazon might very well have been a landscape designed by the patient persistence of indigenous cultures who interacted with the land and the local ecosystems. What if the Amazon Rainforest wasn’t really an intact wilderness area, but rather the result of careful human planning over thousands of years?
The terra preta, or black earth, is a recent discovery that gives rise to the likelihood of the Amazon Rainforest being a carefully structured environment instead of a pristine wilderness. This hypothesis believes that the abnormally black and fertile earth found scattered around the Amazon Rainforest was of the techniques used by indigenous cultures to maintain the fertility of one of the most vulnerable and important ecosystems on earth."
https://permaculturenews.org/2017/08/08/terra-preta-amazon/
The terra preta, or black earth, is a recent discovery that gives rise to the likelihood of the Amazon Rainforest being a carefully structured environment instead of a pristine wilderness. This hypothesis believes that the abnormally black and fertile earth found scattered around the Amazon Rainforest was of the techniques used by indigenous cultures to maintain the fertility of one of the most vulnerable and important ecosystems on earth."
https://permaculturenews.org/2017/08/08/terra-preta-amazon/