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Plants and animals assimilate carbon 14 from carbon dioxide throughout their lifetimes.

When they die, they stop exchanging carbon with the biosphere and their carbon 14 content then starts to decrease at a rate determined by the law of radioactive decay.

Carbon combines with other elements in complex ways to form the molecules that make up our bodies.

Most carbon on Earth is not radioactive, but a very small percentage is.

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No other scientific method has managed to revolutionize man’s understanding not only of his present but also of events that already happened thousands of years ago.You can help Amazing Discoveries reduce costs by upgrading or replacing your internet browser with one of the options below.We thank you in advance for partnering with us in this small but significant way. All methods of radioactive dating rely on three assumptions that may not necessarily be true: It is assumed that the rate of decay has remained constant over time.The carbon in their bodies at the time of their death will remain in their bodies until they decompose, or if they become fossilized, then forever. This allows scientists to look at the amount of decay in a fossil’s radioactive carbon and determine a relative date.Radiocarbon dating is only effective for objects and fossils that are less than 50,000 years old.

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