Outside the range of recorded history, calibration of the 14 clock is not possible.
This means the above calculations are only evolution speculation and NOT backed up by real science.
Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material.
The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles.
The atmospheric concentration of C becomes the fingerprint of this radioisotope in a given year's food supply.
Herbivores lag the atmosphere slightly because their primary carbon source is on the order of months old.
A 10 gram sample of U-238Now that has changed, and some important discoveries are being made.Omnivores and carnivores lag the atmosphere further because their carbon sources are another step removed.However, it has been confirmed that atmospheric C concentration with the date.The isotopic content of new plant growth reflects the atmospheric radiocarbon concentration.New leaves are produced in weeks while larger fruit and vegetables form over the period of a month or two.Various carbon structures, including carbon nanofilament (CNF), single-wall carbon nanotube (SWCNT), multi-wall carbon nanotube (MWCNT), and pyrolytic graphite sheet (PGS), were exposed in air to determine how they vary according to carbon structure and air temperature.