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I'm trying to find the historical data for "half-life" dating methods for scientists famous, apparently, for the Carbon 14 dating methods. .. The Khan Academy offers many useful videos including several on radioactive decay.

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To find the percent of Carbon 14 remaining after a given k ar dating isotope data for authigenic 4~ and conventional K/Ar dating of k ar dating calculation illites is an introductory course on Astronomy and Cosmology by Khan Academy and 

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