In a major leap for archaeological dating, a study published in Science Advances on April 5, 2026, details a new application of cosmogenic nuclide dating. By measuring the accumulation of beryllium-10 and aluminum-26 in buried quartz stone tools found in the Brazilian Highlands, researchers have pushed back the timeline of human occupation in South America to approximately 40,000 years ago.
This breakthrough provides high-precision chronological evidence that significantly challenges the Clovis-first migration model. The research team from the Oxford Radiocarbon Accelerator Unit emphasized that this new methodology allows for the dating of lithic artifacts in environments where organic material for Carbon-14 dating has long since decayed. The findings suggest that early humans were capable of crossing diverse ecological zones much earlier than previously hypothesized by the scientific community.