How does carbon dating work?
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We track one of the carbon isotopes, one that’s very rare and radioactive, called radiocarbon. This radiocarbon, being radioactive, decays over time, reducing in amount (and turning into regular carbon). Since it’s mostly a constant amount being produced, by measuring how much radiocarbon there is, you can tell how long it has been decaying. If you know how long it has been decaying, you know when it died.
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