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Radiometric dating wrong
That is why you need at least two, sometimes three judges to measure the time of the race to the standard needed to enter the record books.
That is, they take up less than would be expected and so they test older than they really are.
Furthermore, different types of plants discriminate differently.
This illustrates the whole problem with the radioactive dating of geological events.
Those who promote the reliability of the method spend a lot of time impressing you with the details of radioactive decay, half-lives, mass-spectroscopes, etc.
Familiar to us as the black substance in charred wood, as diamonds, and the graphite in “lead” pencils, carbon comes in several forms, or isotopes.
One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or C ratio gets smaller.
You could talk about the tiny quartz crystal and the piezoelectric effect used to provide a stable time base for the electronic movement.
You could describe the atomic workings of the quartz oscillator and how it resonates at a specific and highly stable frequency, and how this is used to accurately pace a timekeeping mechanism.
So, we have a “clock” which starts ticking the moment something dies.
Obviously, this works only for things which were once living.