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It takes another 5,730 for half of the remainder to decay, and then another 5,730 for half of what's left then to decay and so on.
The period of time that it takes for half of a sample to decay is called a "half-life." Radiocarbon oxidizes (that is, it combines with oxygen) and enters the biosphere through natural processes like breathing and eating.
This was a joint event of the American Geophysical Union (AGU) and the Asia Oceania Geosciences Society (AOGS).
It appears that the researchers approached the matter with considerable professionalism, including taking great pains to eliminate contamination with modern carbon as a source of the C signal in the bones.
The lead presenter was Dr Thomas Seiler, a German physicist whose Ph D is from the Technical University of Munich.
The video of his presentation was up on You Tube at the time of writing this report.
When a creature dies, it ceases to consume more radiocarbon while the C-14 already in its body continues to decay back into nitrogen.
There was no material available but they used a hunk of wood from the layer?
This alone tells anyone that cares to stop and think that the research is based on a fucking lie.
This is how carbon dating works: Carbon is a naturally abundant element found in the atmosphere, in the earth, in the oceans, and in every living creature.
C-12 is by far the most common isotope, while only about one in a trillion carbon atoms is C-14.
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In other words, there would be too few decays to accurately date the sample.