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In the study, he extrapolates that in even more ancient periods, it could vary even more significantly.“Over the three centuries for which we have data at present the ‘average’ is around 20 years.“We analyze 14C levels in known-age native Juniperus phoenicea tree rings across this period, employing a tree-ring chronology constructed from samples from historic structures at Taybet Zaman (TZM) in southern Jordan,” he writes in the article.They measured how much carbon-14 was found in the rings’ annual growth. “It is one of the very few tree species growing in the southern Levant for which it is possible to build secure multi-century annually resolved tree-ring records,” he explains to The Times of Israel.Today, traditional carbon dating is aided by the Int Cal13 curve — revised and adopted in 2013.The curve is based on securely dated findings taken from trees, usually oaks or conifers, from the northern hemisphere.The isotope, which has eight neutrons and an atomic mass of 14 (thus the C-14), is mixed with oxygen and creates radioactive carbon dioxide, which is then “inhaled” by plants through photosynthesis.

However, this standardized calibration, Int Cal13, is used in international testing.The idea was to find a species which would accurately represent the growing period in the region.Whereas the species the Int Cal13 calibration is based on grows from late spring to late summer, most native southern Levant fauna do not.Archaeologists’ evidence of Israelite settlement in the Land of Canaan and the foundation of a magnificent biblical Kingdom of David is being called into question.According to a new Cornell University study of radiocarbon testing in the southern Levant, what little organic material researchers have unearthed that was believed by scientists to have originated at the dawn of the Israelite settlement, may not have been dated properly.

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