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Three isotopes of carbon are found in nature; carbon-12, carbon-13 and carbon-14.
Carbon-12 accounts for ~99.8 % of all carbon atoms, carbon-13 accounts for ~1% of carbon atoms while ~1 in every 1 billion carbon atoms is carbon-14.
Targets in multi-date scenes are extremely variable and have been nearly impossible to compare in an automated mode (Kim and Elman, 1990).
Because this decay is constant it can be used as a “clock” to measure elapsed time assuming the starting amount is known.
"Int Cal04 Terrestrial radiocarbon age calibration".
MIDDLE KINGDOM Dynasties 11 – 13 Joseph ruler in 2041 under Mentuhotpe II.
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It is very hard to divest oneself of presuppositions and formerly held theories.