Cave Walls Hold 2,000-Year-Old Human DNA in Spain
Scientists discovered human DNA more than 2,000 years old preserved on cave walls in Spain and Portugal, turning ancient rock surfaces into biological time capsules. The breakthrough opens entirely new ways to study how prehistoric people lived.
Cave walls have been hiding a secret for thousands of years, and scientists just figured out how to read it.
A research team led by Hipólito Collado has recovered human DNA more than 2,000 years old from cave walls in Spain and Portugal. The discovery transforms how we can study ancient human history.
The team analyzed 24 rock art panels across eleven caves using advanced genetic techniques. They found preserved human DNA not just on painted surfaces in Portugal's Escoural cave, but also on unpainted walls in both Escoural and Spain's Covarón cave in Asturias.
This marks the first time scientists have proven that cave walls can preserve human DNA for millennia. Until now, researchers relied solely on bones, sediments, and tools to extract ancient genetic material.
The project grew from the First Art initiative, which studied rock art in the Maltravieso cave in Cáceres, home to some of Europe's oldest paintings. Researchers from Spain, Portugal, the United Kingdom, Germany, and China collaborated with Germany's Max Planck Institute for Evolutionary Anthropology.
The DNA samples revealed fascinating details about who visited these caves. Three samples came from women, one from a man, and one couldn't be determined with certainty.
Why This Inspires
This breakthrough means we can now explore prehistoric sites without disturbing fragile artifacts or remains. Cave walls act as "biological archives" that capture snapshots of ancient human activity through the genetic traces people left behind simply by touching the rock.
The minimally invasive extraction techniques mean scientists can study countless sites previously off-limits due to preservation concerns. Each cave wall becomes a potential library of information about how our ancestors lived, moved, and created art thousands of years ago.
The research, published in Nature Communications, opens doors to understanding prehistoric populations in ways that seemed impossible just years ago. We can now map migration patterns, understand family structures, and learn about daily life from surfaces that witnessed history firsthand.
These ancient walls are finally ready to tell their stories.
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Based on reporting by Euronews
This story was written by BrightWire based on verified news reports.
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