old human DNA found in caves in S

Researchers have successfully extracted 2,000-year-old human DNA from cave walls in Spain and Portugal. This discovery suggests that cave surfaces can act as biological archives, offering new ways to study prehistoric human activity without disturbing archaeological sites.
Why it matters
This breakthrough provides a non-invasive method for archaeologists to identify the inhabitants and creators of ancient cave art.
Science & Tech: 2,000-year-old human DNA found in caves in S
The article is a straightforward report on a scientific discovery.
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