Ancient ingenuity: Amazon tribes built fishponds to survive long droughts

(Natural News) According to a study led by researchers from the Federal University of Western Para in Brazil along with colleagues from France and Germany, ancient tribes that lived in the Llanos de Moxos region in Bolivia for thousands of years used a network of fish ponds to support their settlements. The researchers also believe that these fish ponds were used to protect the tribes against the months-long droughts that are common in that area of the Amazon Basin.
The researchers, whose findings were published in the open-access journal PLOS ONE, studied ancient settlements found in the Llanos de Moxos region in Bolivia. This area is a vast savanna that floods annually from around October to April and then receives virtually no rain for the rest of the year. The researchers say that humans that settled in the area began construction on massive earthen mounds that acted as permanent settlements beginning at around 500 AD. One such settlement, known as Loma Salvatierra, was located more than 31 miles (50 km) from the nearest river, the Mamore River that belongs to the massive Amazon River system.
Previous research into the Llanos de Moxos area suggests that pre-Hispanic settlements like Loma Salvatierra built a series …

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