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The impact of the radiocarbon dating technique on modern man has made it one of the most significant discoveries of the 20th century. This means that given a statistically large sample of carbon 14, we know that if we sit it in a box, go away, and come back in years, half of it will still be carbon 14, and the other half will have decayed. Australia has two machines dedicated to radiocarbon analysis, and they are out of reach for much of the developing world. Living organisms from today would have the same amount of carbon as the atmosphere, whereas extremely ancient sources that were once alive, such as coal beds or petroleum, would have none left.
In a system where carbon is readily exchanged throughout the cycle, the ratio of carbon to other carbon isotopes should be the same in a living organism as in the atmosphere. Animals and people take in carbon by eating the plants. Because of this, radiocarbon chemists are continually developing new methods to more effectively clean materials. Willard Libby's concept of radiocarbon dating Willard Libby — , a professor of chemistry at the University of Chicago, began the research that led him to radiocarbon dating in