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First, for carbon-14 dating to be accurate, one must assume the rate of decay of carbon-14 has remained constant over the years.

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The carbon-14 that results from the reaction caused by cosmic radiation quickly changes to carbon dioxide, just like normal carbon-12 would.

Plants utilize, or breath in carbon dioxide, then ultimately release oxygen for animals to inhale.

The half-life of carbon 14 is approximate 5,730 years.

That means if you took one pound of 100 percent carbon-14, in 5,730 years, you would only have half a pound left.

Carbon-14 is created in the upper atmosphere as nitrogen atoms are bombarded by cosmic radiation.