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The new dates were obtained using radiocarbon dating.Over the decades rock art has proved extremely difficult to directly date.A new dating method finally is allowing archaeologists to incorporate rock paintings — some of the most mysterious and personalized remnants of ancient cultures — into the tapestry of evidence used to study life in prehistoric times.That’s the conclusion of a new report in ACS’ Analytical Chemistry. Rowe points out that rock paintings, or pictographs, are among the most difficult archaeological artifacts to date.They lack the high levels of organic material needed to assess a pictograph’s age using radiocarbon dating, the standard archaeological technique for more than a half-century.Rowe describes a new, highly sensitive dating method, called accelerator mass spectrometry, that requires only 0.05 milligrams of carbon (the weight of 50 specks of dust).As a senior writer for Live Science, Laura Geggel covers general science, including the environment and amazing animals.She has written for The New York Times, Scholastic, Popular Science and Spectrum, a site covering autism research.

This report presents progress made on a technique for C dating pictographs. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

In a study published in the international journal Antiquity, Professor David Pearce, Director of the Rock Art Research Institute at the University of the Witwatersrand, Johannesburg, Adelphine Bonneau of Laval University, Canada, and colleagues at the University of Oxford showed that paintings in south-eastern Botswana are at least 5500 years old, whilst paintings in Lesotho and the Eastern Cape Drakensberg, South Africa, date as far back as 3000 years.

The findings represent a major breakthrough in archaeological research.

Before a dam flooded a site replete with ancient rock art in Botswana, researchers nabbed fragments of the painted creations so that they could date them.

The team then developed a new method that isolated the original carbon from the paint — in this case, charcoal, soot and carbon black (a blend of burnt fat) — so they could determine the age with radiocarbon dating.

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