In addition to the reasons mentioned in the previous paragraph, the flood provides another evidence that this is a faulty assumption.During the flood, subterranean water chambers that were under great pressure would have been breached.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.
The half-life of carbon 14 is approximate 5,730 years.
This carbon-14 dioxide then ends up in humans and other animals as it moves up the food chain. Libby introduced the carbon-14 dating method at the University of Chicago.
There is then a ratio of carbon-14 to carbon-12 in the bodies of plants, humans, and other animals that can fluctuate, but will be fixed at the time of death. The premise behind the method is to determine the ratio of carbon-14 left in organic matter, and by doing so, estimate how long ago death occurred by running the ratio backwards.
After death, the carbon-14 would begin to decay at the rate stated above. The accuracy of this method, however, relies on several faulty assumptions.
First, for carbon-14 dating to be accurate, one must assume the rate of decay of carbon-14 has remained constant over the years.