Lasers reveal hundreds of geoglyphs made by a mysterious civilization in the Amazon rainforest thousands of years ago

By: livescience Posted On: July 29, 2026 View:

aerial image of a geometric geoglyph in a heavily forested area of Brazil — Archaeologists discovered ancient geoglyphs like this square-shaped one in Acre, Brazil.

(Image credit: Martti Pärssinen)

Using laser scanning technology to peer beneath the dense canopy of the Amazon rainforest, archaeologists have discovered hundreds of ancient earthworks that were made by a complex, enigmatic society over two millennia ago, a new study finds.

This ancient civilization, called the Aquiry, arose 2,500 years ago in Brazil. Based on the large number of earthworks, called geoglyphs, the Aquiry may have had 3 million people before the society collapsed, the researchers suggested in the study.

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Staff writer

Kristina Killgrove is a staff writer at Live Science with a focus on archaeology and paleoanthropology news. Her articles have also appeared in venues such as Forbes, Smithsonian, and Mental Floss. Kristina holds a Ph.D. in biological anthropology and an M.A. in classical archaeology from the University of North Carolina, as well as a B.A. in Latin from the University of Virginia, and she was formerly a university professor and researcher. She has received awards from the Society for American Archaeology and the American Anthropological Association for her science writing.

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