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Its existence had been suggested by Franz Kurie in 1934. The primary natural source of carbon-14 on Earth is cosmic ray action on nitrogen in the atmosphere, and it is therefore a cosmogenic nuclide.

However, open-air nuclear testing between 1955–1980 contributed to this pool.

Since atmospheric carbon 14 arises at about the same rate that the atom decays, the Earth's levels of carbon 14 have remained constant.

In living organisms, which are always taking in carbon, the levels of carbon 14 likewise stay constant.

is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past.

It can be used on objects as old as about 62,000 years.

The procedure of radiocarbon dating can be used for remains that are up to 50,000 years old.

Because of the inconsistencies and uncertainties of C14 dating, most archaeologists prefer historical dates over C14 dates. Editorial note: The evidence for the destruction of Jericho at the time the Bible describes it and the way the Bible describes it is overwhelming. A form of radiometric dating used to determine the age of organic remains in ancient objects, such as archaeological specimens, on the basis of the half-life of carbon-14 and a comparison between the ratio of carbon-12 to carbon-14 in a sample of the remains to the known ratio in living organisms. A technique for measuring the age of organic remains based on the rate of decay of carbon 14.But in a dead organism, no new carbon is coming in, and its carbon 14 gradually begins to decay.So by measuring carbon 14 levels in an organism that died long ago, researchers can figure out when it died.

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This is an idea that’s not new to New York-based artist Allison Wade, 37, who turns her terrible text message exchanges with exes into artwork. ” and “This is my last attempt to get in touch with you before I feel like a stalker.”Her text-message paintings, which have been on display in galleries and art fairs throughout the East Coast, are samples from Wade’s post-divorce digital dating life.

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