Radioactive dating of organic materials

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Levels of carbon-14 become difficult to measure and compare after about 50,000 years (between 8 and 9 half lives; where 1% of the original carbon-14 would remain undecayed).

Thus they had a radiocarbon ‘age’ far less than a million years!

Although it sometimes requires taking minute samples of an object, even that damage may be unacceptable for some artifacts.

The new method does not involve removing a sample of the object.

) is only 5,730 years—that is, every 5,730 years, half of it decays away.

After two half lives, a quarter is left; after three half lives, only an eighth; after 10 half lives, less than a thousandth is left.

Diamond is the hardest substance known, so its interior should be very resistant to contamination.

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