Radiocarbon dating

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The amount of C14 in the atomsphere varies over time

For this it uses the radioactive isotope carbon-14. It is also known as C-14 method because of this. The half life of C14 is about 5,730 years. This makes it possible to tell the age of things that contain carbon, to about 60,000 years old; Dates obtained that way are usually written as before present (Present is 1950). It is not possible to tell the age exactly,

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