Human Occupation Of The North American Colorado Plateau ∼37,000 Years Ago

This groundbreaking study examined mammoth bones found at the Hartley site on the Colorado Plateau, using advanced imaging technology including CT scans to look for signs of ancient human activity. The researchers dated these bones to approximately 37,000 years ago using radiocarbon dating of bone collagen, which would make this evidence of human presence in North America much older than the commonly accepted timeline of around 16,000 years ago.

The scientists found what they believe to be clear evidence that early humans butchered two mammoths at this site, using simple stone and bone tools rather than the sophisticated stone technology that later Native American groups would develop. They also identified signs that these early people may have used controlled fire, suggesting more advanced behaviors than previously thought possible for such ancient American populations.

This research is significant because it pushes back the timeline of human arrival in the Americas by more than 20,000 years. Understanding when and how our ancestors spread across the globe helps us better comprehend human adaptation, survival strategies, and the development of behaviors that supported long-term health and survival in challenging environments.

From a metabolic health perspective, this study highlights how our ancestors successfully adapted to diverse environments and food sources, including the hunting and processing of large animals like mammoths. While this research doesn't directly inform current clinical practice, it contributes to our understanding of human evolutionary history and the dietary patterns that supported our species' survival and expansion across continents.