Recent genetic research has revealed that most early Europeans maintained dark skin, hair, and eyes until around 3,000 years ago. This surprising discovery challenges previous assumptions about the evolution of pigmentation in ancient populations. While lighter features, such as pale skin, blue eyes, and lighter hair, began to appear in genetic samples around 14,000 years ago, they were still rare for many millennia. It wasn’t until the Iron Age that these lighter traits became more widespread across Europe. Researchers suggest that the gradual spread of lighter pigmentation may have been linked to the need for enhanced vitamin D production in regions with limited sunlight, providing an evolutionary advantage for those living in higher latitudes.
The study, published on the bioRxiv preprint server, involved an in-depth analysis of genetic material from 348 ancient individuals. These samples, which ranged in age from 45,000 years old to more recent periods, helped reconstruct the pigmentation patterns of early European populations. Among the most significant finds were the remains of an individual from Ust’-Ishim in western Siberia, dating back to 45,000 years ago, and a well-preserved genome from a Swedish individual who lived around 9,000 years ago. Despite the degradation of many of the samples, scientists used advanced techniques, such as probabilistic phenotype inference and the HIrisPlex-S system, to infer the physical traits of these ancient people.
Silvia Ghirotto, the study’s lead author and a geneticist at the University of Ferrara, emphasized that while lighter skin and features did appear sporadically throughout time, dark pigmentation remained the dominant trait in many parts of Europe until the Copper Age. In fact, darker skin and eye color persisted in certain regions well into the Iron Age. This slow transition to lighter pigmentation underscores the complex interplay of genetic, environmental, and evolutionary factors that shaped the diverse physical appearances of ancient Europeans.
The findings have significant implications for understanding the genetic history of modern Europeans and the factors that influenced the development of human traits over time. While the presence of lighter pigmentation in ancient populations was not immediately widespread, its gradual emergence highlights the adaptive strategies that helped early humans survive and thrive in changing environmental conditions. This study provides valuable insights into the complex nature of human evolution and the genetic legacy that continues to shape populations today.