A new scientific analysis is challenging long-standing beliefs about when humans first settled in the Americas, raising fresh questions about one of archaeology’s most influential sites.
For decades, Monte Verde in southern Chile has been considered a key piece of evidence showing that humans lived in the Americas at least 14,500 years ago — well before the Clovis culture, once thought to represent the continent’s earliest inhabitants. The site gained global recognition in the late 20th century and helped reshape the understanding of early human migration.
Now, researchers led by Todd A. Surovell of the University of Wyoming report that Monte Verde may be far younger than previously believed. Their findings, published in Science, suggest the site could date back only about 8,200 years, significantly altering its place in the timeline of human settlement.
New geological evidence challenges earlier timeline
The research team conducted a detailed study of sediment layers along Chinchihuapi Creek, which runs alongside the Monte Verde site. During the investigation, scientists identified a buried layer of volcanic ash beneath the archaeological remains. The ash has been dated to an eruption approximately 11,000 years ago.
Because the artifacts sit above this ash layer, researchers argue they must be younger. This conclusion contradicts earlier estimates and places the site in the Middle Holocene period, thousands of years later than previously believed.
Co-author Claudio Latorre of the Pontifical Catholic University of Chile said the team reexamined the site’s geological structure and found that earlier interpretations may have misread how sediment layers formed over time. According to the study, natural processes such as water flow and erosion could have shifted materials, leading to incorrect dating.
Debate grows among archaeologists
The study has sparked strong reactions within the scientific community. Some experts argue the new findings overlook extensive evidence gathered during earlier excavations. Archaeologist Tom Dillehay, who led the original work at Monte Verde, pointed to artifacts such as tools and a modified mastodon tusk as proof of the site’s older age.
Other researchers questioned whether the new analysis adequately examined the core archaeological layers, noting that the surrounding terrain may not accurately reflect conditions at the site itself.
Despite the criticism, Surovell maintains that the study included samples from both the site and nearby areas. Researchers say the findings highlight the need for independent verification of early archaeological sites.
If confirmed, the revised timeline could reshape theories about how and when humans first entered the Americas, reopening a debate once thought settled.