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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.

It is our principal source of information about the age of the Earth and a significant source of information about rates of evolutionary change.

Radiometric dating is a technique used to date materials based on a knowledge of the decay rates of naturally occurring isotopes, and the current abundances.

A radioactive isotope of the inert gas argon 39, for example, is ...

— Using the largest set of radiocarbon dates ever obtained from a single Maya site, a team of archaeologists have developed a high-precision chronology that sheds new light on patterns leading up to ...

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.

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One of the nice things about this method is that we don't have to worry about carbon being lost from the sample.

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