“Willard Libby (a scientist who won the Nobel Prize in Chemistry) developed radiocarbon dating as a method of measuring radioactivity. Carbon-14 is a weakly radioactive isotope of carbon; also known as radiocarbon. Radiocarbon dating cannot be applied to metals, but only to selected organic and inorganic materials. The three main radiocarbon dating methods are: (1) proportional gas counting, (2) liquid scintillation counting, and (3) accelerator mass spectrometry. (Analytical Beta). Radiocarbon dating is the only scientific method capable of revolutionizing man's understanding of events that occurred in the past and also in the present. It is used to prove and disprove theories in archeology and other sciences. (Beta Analytic)Carbon-14 is unstable and its atoms decay into nitrogen atoms. (Biblical Chronology). Willard Libby was the first person to measure the half-life of radiocarbon, or carbon-14, recording it as 5,730 years. When alive, plants absorb and digest carbon-14 from carbon dioxide. (Beta Analytic). They absorb their C atoms through the foods they consume. The absorption of atoms stops when the organism dies. (Biblical Chronology). Their carbon-14 content gradually decreases once they are dead. The speed at which the decrease occurs is determined by the law of radioactive decay. The amount of carbon-14 left in an organism after its death can be used to determine how old it is, what its age is. (Beta Analytic) Proportional gas counting. This method counts beta particles (products of radiocarbon decay) released by a particle or organism. Measurement in proportional gas meters occurs after the carbon has been converted into carbon dioxide. (Beta Analytic)Liquid Scintillation CountingIn this method, a twinkle......in the center of the paper......licalchronologist.org/answers/c14_method.php• Richter, AM 2009. Carbon dating and archaeology: the radioactive clock (accessed August 2009): http://archive.cyark.org/carbon-dating-and-archaeology-blog?gclid=Cljjv_GskL0CFa3lTAodZ1oAfw• Ojha, SS 2013. AMS- A Novel Method of Dating in Archaeology• Chronological Methods 8- Radiocarbon Dating.: http://archserve.id.ucsb.edu/courses/anth/fagan/anth3/Courseware/Chronology/08_Radiocarbon_Dating.html• Toothman. J. How has radiocarbon dating changed archaeology?. http://science.howstuffworks.com/environmental/earth/geology/radiocarbon-dating-change-archaeology.htm• Hirst. Kk stratigraphy and seriation. Timing is everything: a short course in archaeological dating. http://archaeology.about.com/cs/datingtechniques/a/timing.htm• Higham. T. Petchey. F. C-14 Meetings. http://www.c14dating.com/applic.html