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Radiocarbon dating used in a sentence

Making the job harder still, baffling anomalies turned up.

Tricks also spread through visits between laboratories and at meetings, and sometimes even through publications.One application was a timetable of climate changes for tens of thousands of years back.Many of the traditional chronologies turned out to be far less accurate than scientists had believed — a bitter blow for some who had devoted decades of their lives to the work.The radioactive isotope carbon-14 is created in the upper atmosphere when cosmic-ray particles from outer space strike nitrogen atoms and transform them into radioactive carbon.Some of the carbon-14 might find its way into living creatures.

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In 1958, Hessel de Vries in the Netherlands showed there were systematic anomalies in the carbon-14 dates of tree rings.

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