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Try radiometric dating. Accuracy: $\pm0.11\%$. Radiometric dating - see also the excellent USGS page - uses the decay of radioactive isotopes of elements to determine the age of a sample. It works...
Answer
Try radiometric dating. Accuracy: $\pm0.11\%$. Radiometric dating - see also the excellent USGS page - uses the decay of radioactive isotopes of elements to determine the age of a sample. It works...