Tree-rings reveal secret clocks that could reset key dates across the ancient world

Watts Up With That?

​ ​Trees which grew during intense radiation bursts in the past have ‘time-markers’ in their tree-rings that could help archaeologists date events from thousands of years ago

Oxford University researchers say that trees which grew during intense radiation bursts in the past have ‘time-markers’ in their tree-rings that could help archaeologists date events from thousands of years ago. In a new paper, the authors explain how harvesting such data could revolutionise the study of ancient civilisations such as the Egyptian and Mayan worlds. Until now scholars have had only vague evidence for dating when events happened during the earliest periods of civilisation, with estimates being within hundreds of years. However, the unusually high levels of the radioactive isotope carbon-14 found in tree-rings laid down during the radiation bursts could help reliably pinpoint dates. The distinct spikes act as time-markers like secret clocks contained in timber, papyri, baskets made from…

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