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The best estimate of the half-life of Carbon-14 is 5730 years. Scientists can determine the age of ancient objects by a method called radiocarbon dating. it is not the half-life used by the people who actually calculate archaeological dates.

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Radiocarbon dating | A is for Archaeology

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Half-Life Calculator - Calculates Time, Half-Time, Beginning Amount

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31 May 1990 Because it is radioactive, carbon 14 steadily decays into other given amount of carbon 14 decays in 5,730 years), scientists can calculate the 

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