The carbon-14 so produced decays by β-decay back into nitrogen-14.This decay process follows a mathematical rule, depending on the length of the so-called half-life. After yet another 10 minutes, there would be just 12.5g left.Carbon-13 is also stable, radioactively, but carbon-14 is radioactive.Atoms of carbon-14 are produced in the atmosphere by neutron bombardment of atoms of nitrogen-14. The first is that atoms have always decayed at the same rate.And this isn’t really an assumption as the decay rates have been tested in the laboratory for a hundred years or so, we have an example of a natural nuclear reactor where we can measure the various products and determine the decay rates (and the fine structure constant), and we can observe the past by looking deep into the past of the universe. The sigh isn’t for the effort of writing, it’s for the effort of finding all the references.Scientists, using rigorous methods have established a process to eliminate this problem by calibrating radiocarbon dating results to items of a known age.
They thraw through scientific literature, pick the parts that supposedly criticize a scientific method, and put up claims that mainstream Science is bogus.
Discovered by Willard Frank Libby and his colleagues in 1949, during his tenure as a professor at the University of Chicago, Libby invented what would eventually change the face of archaeology by giving a time frame to fossilized specimens.