Unverified50% confidenceFactExact time
Before the arrival of colonizers, a region comprising only about 3% of the Amazon basin's rainforest area may have supported complex civilizations with a population of up to 3 million people.
1
Sources
50%
Confidence
Long-term
Relevance
8/9/2026
First Seen
Sources
亚马逊失落文明：3%雨林面积曾养活300万人口
Related Claims
Unverified3% of the Amazon rainforest area is approximately 165,000 square kilometers, and a population of 3 million implies an average density of about 18 people per square kilometer78% similarUnverifiedModern ecological surveys have found that the density of useful plants in the Amazon rainforest is far higher than expected from random distribution, with the proportion of domesticated and semi-domesticated species being particularly significant near ancient settlement sites.67% similarUnverifiedThe Amazon rainforest covers approximately 5.5 million square kilometers, contains about 10% of the world's species diversity, and stores approximately 150 to 200 billion tons of carbon66% similarUnverifiedThe Brazilian portion of the Amazon rainforest covers approximately 4 million square kilometers, accounting for about 60% of the entire rainforest.66% similarUnverifiedAncient Amazonian societies are anthropologically classified as 'complex chiefdoms,' characterized by hierarchical differentiation, division of labor, and regional trade networks, but without writing systems or bureaucratic institutions61% similar
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