Dating for 4 months

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Lopez recently revealed that that will never change.

By contrast, methane created from petroleum showed no radiocarbon activity because of its age.

In addition to permitting more accurate dating within archaeological sites than previous methods, it allows comparison of dates of events across great distances.

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

Libby received the Nobel Prize in Chemistry for his work in 1960.

The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.

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