“Most of the carbon in the atmosphere’s carbon dioxide is carbon-12, which is not radioactive.”
“Alpha particles from the decay cause a release of neutrons from the beryllium as it turns to carbon-12.”
“The strongest evidence comes from measurements of the isotopic signature of carbon dioxide -- the amount of carbon-12, -13, and -14 in the atmosphere.”
“So plants take in carbon-14 alongside carbon-12, and incorporate the two kinds of carbon atom in sugars, in the same proportion as they exist in the atmosphere.”
“The ratio of carbon-14 to carbon-12 in the specimen therefore gradually drops further and further below the standard ratio that living creatures share with the atmosphere.”
“And the ratio of carbon-12 to carbon-14 can be used to calculate the time that has elapsed since the death of the creature cut it off from the food chain and its interchange with the atmosphere.”
“Eventually it will be all carbon-12 – or, more strictly, the carbon-14 content will become too small to measure.”
“And Prototaxites displayed a much wider variation in its ratio of carbon-12 to carbon-13 content than would be expected in any plant.”
“Deriving their energy from the sun and their carbon from carbon dioxide in the air, any given type of plant will typically contain a similar ratio of carbon-12 to carbon-13 as another plant of the same type.”
“Dr. Robert Holloway, whose heading to his article reveals his agenda immediately, quotes someone called Major a creationist: Modern radiocarbon dating assumes that the carbon-14/carbon-12 ratio in living organisms is the same now as it was in ancient organisms before they died.”
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