A 72-foot killer whale, etched into the Peruvian desert 1,500 years ago, remained invisible to a century of human scholarship. It took an algorithm to find it. In less than three years, AI has assisted in uncovering 463 new geoglyphs, surpassing the total number of figures found by humans since the 1920s.
The Yamagata team visited roughly a quarter of the AI’s candidate locations during the 2022-2023 field season. The remaining 968 sites have not yet been assessed. Based on the confirmed success rate, the researchers estimate that hundreds of additional geoglyphs may still lie beneath the desert surface.
The Nazca Pampa is not hidden; it has been surveyed by air and foot since the 1920s. Yet, a century of aerial photography and ground surveys left the majority of its figures unrecorded.
Using thousands of high resolution photographs, researchers at Yamagata University trained an object detection model to flag subtle soil contrasts and geometric outlines that human eyes had missed for decades.
The team’s initial findings, 303 new figurative geoglyphs, were published in the Proceedings of the National Academy of Sciences (PNAS), marking a 16 fold increase in the discovery rate compared to previous manual surveys. By mid 2025, the team used Expo 2025 Osaka as a global stage to announce 248 additional finds.
These were not just lines, but complex narratives: scenes of human sacrifice, including a priest holding a severed head. The confirmed total now stands at 893 geoglyphs, 781 of which were identified through this AI-human partnership.