View the full list Radiocarbon dating has transformed our understanding of the past 50,000 years.
Professor Willard Libby produced the first radiocarbon dates in 1949 and was later awarded the Nobel Prize for his efforts.
The calibrated date is also presented, either in BC or AD or with the unit cal BP (calibrated before present - before 1950).Australian National University provides funding as a member of The Conversation AU.The Conversation UK receives funding from Hefce, Hefcw, SAGE, SFC, RCUK, The Nuffield Foundation, The Ogden Trust, The Royal Society, The Wellcome Trust, Esmée Fairbairn Foundation and The Alliance for Useful Evidence, as well as sixty five university members.This means that although they are very similar chemically, they have different masses.
The total mass of the isotope is indicated by the numerical superscript.
Tree rings can be counted and their radiocarbon content measured.