C-14 is produced when high-energy particles from solar radiation hit the earth’s atmosphere and make the unstable element called C-14.
As time goes by, this C-14 slowly changes back to stable atoms.
Yet when you look into the technical papers on these discoveries, you find that these dates are often questionable and are sometimes clearly in error.
Once the organism dies, however, it ceases to absorb carbon-14, so that the amount of the radiocarbon in its tissues steadily decreases.Carbon-14 has a half-life of 5,730 ± 40 years—, half the amount of the radioisotope present at any given time will undergo spontaneous disintegration during the succeeding 5,730 years.Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. “It has proved to be a versatile technique of dating fossils and archaeological specimens from 500 to 50,000 years old.” There are also other radiometric dating methods that are used to date strata and fossils.When a new fossil is discovered, geologists assign a date for when they think the plant or animal lived.They normally use radiometric dating methods to date the fossil, and many promote these methods as being accurate.