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These values are statistically comparable and give an overall weighted mean ΔR of 111 ± 1014C yr.
It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.
Since 1947, scientists have reckoned the ages of many old objects by measuring the amounts of radioactive carbon they contain.
Because it is radioactive, carbon 14 steadily decays into other substances.
Much of the information presented in this section is based upon the Stuiver and Polach (1977) paper "Discussion: Reporting of C14 data". 1890 wood was chosen as the radiocarbon standard because it was growing prior to the fossil fuel effects of the industrial revolution.
In this article, we will examine the methods by which scientists use radioactivity to determine the age of objects, most notably carbon-14 dating.