A multi-disciplinary research team has published a study in Quaternary Science Reviews utilizing a refined Optically Stimulated Luminescence (OSL) dating technique. By analyzing individual grains of quartz found in the sediment layers of the Murray-Darling Basin, the researchers have established a definitive human presence in the Australian interior dating back 52,000 years.
This 'single-grain' approach eliminates the chronological blurring often found in traditional dating, providing a high-resolution timeline of early human arrival and land-use patterns. The findings suggest that the first Australians were capable of rapidly adapting to diverse inland ecosystems, challenging theories of a slow, coastal-only migration route.