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The isotope decreased by a small fraction due to the combustion of fossil fuels, among other factors.
However, the quantity of Carbon-14 was nearly doubled in the ’50s and ’60s because of the atomic bomb testings in those decades.
In fact, many important archaeological artifacts have been dated using this method including some of the Dead Sea Scrolls and the Shroud of Turin.
Though radiocarbon dating is startlingly accurate for the most part, it has a few sizable flaws.
Since 1947, scientists have reckoned the ages of many old objects by measuring the amounts of radioactive carbon they contain.
Though the calibrated date is more precise, many scholars still use the uncalibrated date in order to keep chronologies consistent in academic communities.
Though it’s biggest, the calibration problem is not the only flaw of radiocarbon dating.
New research shows, however, that some estimates based on carbon may have erred by thousands of years.
It is too soon to know whether the discovery will seriously upset the estimated dates of events like the arrival of human beings in the Western Hemisphere, scientists said.