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It might take a millisecond, or it might take a century. But if you have a large enough sample, a pattern begins to emerge.

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However, in the very principal of radiometric dating there are several vital assumptions that have to be made in order for the age to be considered valid.

Carbon dating is used to determine the age of biological artifacts up to 50,000 years old.

This technique is widely used on recent artifacts, but educators and students alike should note that this technique will not work on older fossils (like those of the dinosaurs alleged to be millions of years old).

Carbon-14 cannot be used to date biological artifacts of organisms that did not get their carbon dioxide from the air.

This rules out carbon dating for most aquatic organisms, because they often obtain at least some of their carbon from dissolved carbonate rock.