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The method of radiocarbon dating and its potential usefulness was discovered and developed by a team of scientists led by the late Dr Willard Libby He later received a Nobel Peace Prize for chemistry Since the formation and calibration of radiocarbon dating it has risen to become the field standard for dating all carbon containing substances Radiocarbon dating has lead to the development of other radioisotope dating methods such as potassium-argon and uranium-238 Because of its relatively short half-life radiocarbon dating has been most useful to archaeology geology requiring a much larger time span hence the development of uranium-238 dating Because radiocarbon dating is the cornerstone of conventional views of archaeological pre-history it has been targeted by those who do not hold true to conventional theory Most notable are the Christian creationists who believe the world is no more than 6000 years old A variety of attacks have been designed to try to discredit radiocarbon dating inconstant levels of atmospheric radiocarbon false interpretations etc When one examines these arguments however it becomes clear that despite these apparent problems radiocarbon dating is accurate In order to understand the problems and solutions that apply to radiocarbon dating one must first understand the process by which radiocarbon dating works The process of radiocarbon dating is a fairly simple one understood in most high school chemistry classes Nitrogen in the upper atmosphere is bombarded by cosmic rays and stray neutrons then combine with the nitrogen and knock off a proton forming the radioactive isotope carbon-14 or radiocarbon The radiocarbon then forms 14CO2 or carbon-14 dioxide Plants and animals are always inhaling carbon dioxide and occasionally some carbon-14 dioxide slips in Since plants and animals respire constantly the ratio of carbon dioxidecarbon-14 dioxide is the same as that in the atmosphere until the day something dies When a plant or animal dies it stops respiring and the radiocarbon is no longer replenished then the radiocarbon that was there beta decays
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