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Willard Frank Libby reasoned that Carbon-14 absorbtion by plants would stop when the plant died, and that bu mearuring the Carbon-12 to Carbon-14 Ratio you could accurately determine the age of any organic material up to 45,000 years old. He won a nobel prize for this in 1960.
We know of some books and movies published this year.
last modified 13:33 2006/04/25