This suggests that some of the Amazon we know today was largely influenced by ancient human activity — and one of the latest pieces of evidence that support this idea comes from mysterious designs in the Brazilian state Acre.
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These designs in the Amazon rainforest were created 2,000 years ago — and archaeologists are still baffled by them
The Amazon isn't as pristine as you might think. Turns out, humans have been changing its landscape for thousands of years.
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Hundreds of these man-made designs popped up in the 1980s, but archaeologists still aren't sure what purpose they served. But, a new study, published in the Proceedings of the National Academy of Sciences samples collected at a few of the sites contained evidence of charcoal — a byproduct of fire.
Most likely, ancient humans were setting fires in the Amazon as an early form of deforestation.
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