Problem of carbon dating
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.This would have upset the ratio of carbon-14 to carbon-12. Libby also assumed that the amount of carbon-14 being presently produced had equaled the amount of carbon-12 – he assumed that they had reached a balance.The formation of carbon-14 increases with time, and at the time of creation was probably at or near zero.Third, for carbon-14 dating to be accurate, the concentrations of carbon-14 and carbon-12 must have remained constant in the atmosphere.In addition to the reasons mentioned in the previous paragraph, the flood provides another evidence that this is a faulty assumption.
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.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 industrial revolution greatly increased the amount of carbon-12 released into the atmosphere through the burning of coal.
Also, the atomic bomb testing around 1950 caused a rise in neutrons, which increased carbon-14 concentrations.Experiments have been performed using the radioactive isotopes of uranium-238 and iron-57, and have shown that rates can and do vary.In fact, changing the environments surrounding the samples can alter decay rates.The half-life of carbon 14 is approximate 5,730 years.