Carbon dating methodology

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Plankton absorbs, Carbon-14 from the ocean much like terrestrial plants absorb Carbon-14 from the air.

So every living thing has a certain amount of radiocarbon within them.

After an organism dies, the radiocarbon decreases through a regular pattern of decay. The time taken for half of the atoms of a radioactive isotope to decay in Carbon-14’s case is about 5730 years.

He had assumed that amounts of Carbon-14 in the atmosphere had remained constant through time.

In fact, levels of Carbon-14 have varied in the atmosphere through time.

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