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Radiocarbon dating tweaked Libby was wrong about two things.

This calendar, with the months January through December, is a business standard used in many places round the world to define the year: one which hearkens back to Christian and Roman Imperial precedents.

That is why radiocarbon dates are now ‘calibrated’ using a tree-ring calibration curve.

Tree-ring dates are precise to a single year, and dendro-samples can also be radiocarbon dated, allowing 14C measurements to be correlated with calendar dates.

The Radiocarbon Revolution Since its development by Willard Libby in the 1940s, radiocarbon (14C) dating has become one of the most essential tools in archaeology.

Radiocarbon dating was the first chronometric technique widely available to archaeologists and was especially useful because it allowed researchers to directly date the panoply of organic remains often found in archaeological sites including artifacts made from bone, shell, wood, and other carbon based materials.




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