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Thus a great deal of care is taken in securing and processing samples and multiple samples are often required if we want to be confident about assigning a date to a site, feature, or artifact (read more about the radiocarbon dating technique at: It can be inhaled into the lungs, along with its decay products, where it will reside for a period of time after exposure.
In addition, the earth, and all living things on it, are constantly bombarded by radiation from outer space.
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