Wall Street Journalのインスタグラム(wsj) - 3月28日 05時42分

Long before Europeans ever set foot on the Americas, the Amazon rainforest was teeming with an ancient civilization that transformed the environment around it, according to archeologists now poring over evidence of long buried farms, settlements and roads. These remarkable findings were first spotted by a retired financial manager in São Paulo, Brazil, who studies free online satellite photos as a hobby. This photo shows a circular earthwork about 500 feet in diameter located on a hilltop in the Upper Tapajos Basin.⠀
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Read more about how satellite imagery, radar, and drone-mounted cameras are upending longstanding notions of the Amazon as a virgin wilderness at the link in our bio.⠀
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?: Jose Iriarte / Nature Communications

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