A new technique for extracting DNA from ancient artefacts without destroying them could give us unprecedented insights about the people who made or wore them
Max Planck Institute for Evolutionary Anthropology
The tooth, worn as a necklace bead, probably absorbed DNA from the person’s sweat as it lay against her chest and neck.at Leiden University in the Netherlands and her colleagues were able to extract that DNA without damaging the tooth through a new process that took eight years to develop. The technique might reveal unprecedented details about the social customs and gender roles of ancient populations, says Soressi.
To see if DNA could be coaxed out of ancient artefacts without destroying them, Soressi and her colleagues tested numerous combinations of chemicals and heating regimes on 10 previously excavated artefacts from Palaeolithic caves in France. They found that placing them in a sodium phosphate solution and raising the temperature incrementally from 21°C to 90°C led to the release of relatively large amounts of human DNA with no damage to the specimens.
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