Analysis of ancient DNA from 348 individuals living between 45,000 and 1,700 years ago is offering fresh perspectives on how skin pigmentation evolved in Europe. The latest research indicates that up until roughly 3,000 years ago, dark skin was prevalent among most Europeans, while lighter skin tones remained uncommon during much of prehistoric times.
Scientists from the University of Ferrara in Italy uncovered evidence showing that even at the height of the Roman Empire, lighter skin had not yet become widespread. Their data imply that dark pigmentation was still a typical trait across large parts of Europe just 1,700 years ago.
Uneven and Gradual Emergence of Light Skin
Newscientist reports that the progression toward lighter skin occurred in a complex, non-linear fashion. While lighter skin tones first emerged around 14,000 years ago in Sweden, these traits remained scarce across the continent for millennia.
Throughout the Copper and Bronze Ages (approximately 7,000 to 3,000 years ago), the shift toward paler skin began, yet populations with darker pigmentation still flourished widely.
By the Iron Age (3,000 to 1,700 years ago), lighter skin had become nearly as prevalent as dark skin in Northern and Central Europe, although regions such as Italy, Spain, and Russia retained predominantly darker complexions.
Tracing Skin Pigmentation Over Time
During the Paleolithic era (45,000–13,000 years ago), nearly all Europeans possessed dark skin, with just one known individual exhibiting a medium shade. This pattern held into the Mesolithic era (12,000–8,000 years ago), where, for example, 65% of individuals in France had darker skin, while Sweden showed the earliest signs of lighter pigmentation.
In the Neolithic period (8,000–3,500 years ago), dark skin tones remained dominant. In Britain, approximately 85% of people had darker skin, with similar figures found in France ranging between 85% to 100%. It was not until the Copper Age (3,500–2,000 BC) that skin diversity increased, with Britain seeing an equal distribution between dark and light-skinned individuals.
By the Bronze Age (2,000–500 BC), Britain's population displayed a shift toward intermediate pigmentation in 50%, while 25% had lighter and 25% darker skin. Meanwhile, France experienced a complete transition toward a fully light-skinned population.
What Prompted Lighter Skin to Evolve in Europe?
The evolutionary change is linked to migration and sunlight adaptation. Homo sapiens originated in Africa and migrated into Europe and Asia around 60,000–70,000 years ago. In areas with reduced ultraviolet (UV) radiation, darker skin—rich in melanin—provided less of an advantage.
Lighter skin permitted more UV rays to reach the skin, supporting the production of vitamin D, vital for healthy bones and muscle function. Conversely, darker skin offered superior defense against UV damage in regions with intense sunlight.
Over millennia, as inhabitants adapted to Europe's lower sunlight levels, paler skin tones gradually became more common—though this process was considerably slower than previously assumed.
Changing Perspectives on European Genetic Heritage
This research overturns the widespread belief that light skin has been the default European trait for millennia. Instead, it highlights a slow, regionally varied evolution influenced by genetics, environmental factors, and UV exposure.
As ongoing genome sequencing continues, the narrative of how human physical characteristics adapted to climate and geography gains clarity—demonstrating that Europe’s ancestral history is far more intricate than formerly understood.
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