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Limits of radiocarbon dating

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Seventy years ago, American chemist Willard Libby devised an ingenious method for dating organic materials. His technique, known as carbon dating, revolutionized the field of archaeology. Now researchers could accurately calculate the age of any object made of organic materials by observing how much of a certain form of carbon remained, and then calculating backwards to determine when the plant or animal that the material came from had died. An isotope is a form of an element with a certain number of neutrons, which are the subatomic particles found in the nucleus of an atom that have no charge. While the number of protons and electrons in an atom determine what element it is, the number of neutrons can vary widely between different atoms of the same element.
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Radiocarbon dating

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Radiocarbon Dating - It's Limitations and Usefulness

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The Limitations of Carbon Dating

History, anthropology, and archaeology are three distinct but closely related bodies of knowledge that tell man of his present by virtue of his past. Historians can tell what cultures thrived in different regions and when they disintegrated. Archaeologists, on the other hand, provide proof of authenticity of a certain artifact or debunk historical or anthropological findings. Studying the material remains of past human life and activities may not seem important or exciting to the average Joe unlike the biological sciences.
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There is no single ideal method of dating that can produce accurate results for every kind of sample, in every context, for every chronology. Each method of dating has constraints around its use and effectiveness. Not all methods are well-suited for each situation — and sometimes it is just not possible to use a particular dating method. To gain a reliable date from bone using the radiocarbon, or C dating method, we need to be able to extract the protein from it — collagen and gelatin. The challenge here is that the amount of protein remaining in the bone decreases with age, to the point where there may not be much left in the sample at all.
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