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Histories of archaeology often refer to its impact as the "radiocarbon revolution".

They synthesized Libby and several collaborators proceeded to experiment with methane collected from sewage works in Baltimore, and after isotopically enriching their samples they were able to demonstrate that they contained radioactive .The development of radiocarbon dating has had a profound impact on archaeology.In addition to permitting more accurate dating within archaeological sites than previous methods, it allows comparison of dates of events across great distances.By contrast, methane created from petroleum showed no radiocarbon activity because of its age.The results were summarized in a paper in Science in 1947, in which the authors commented that their results implied it would be possible to date materials containing carbon of organic origin.Atmospheric nuclear weapon tests almost doubled the concentration of concentrations in the neighbourhood of large cities are lower than the atmospheric average.