Carbon 14 is useful for dating fossils that are
So rock samples that should read zero are occasionally placed into the instruments to test their accuracy.
What better samples to use than fossils, coals, and limestones, which are supposed to be millions of years old and should have no radiocarbon?
So if fossils are really millions of years old, as evolutionary scientists claim, no carbon-14 atoms would be left in them.
Indeed, if all the atoms making up the entire earth were radiocarbon, then after only 1 million years absolutely no carbon-14 atoms should be left!
Absolute dating tells when the fossil was formed, relative dating compares fossils to other fossils, some fossils cannot se absolute dating so they have to use both relative and absolute dating together.
It is literally able to count carbon-14 atoms one at a time.3 This machine can theoretically detect one radioactive carbon-14 atom in 100 quadrillion regular carbon-12 atoms! AMS instruments need to be checked occasionally, to make sure they aren’t also “reading” any laboratory contamination, called background.
Imagine the surprise when every piece of “ancient” carbon tested has contained measurable quantities of radiocarbon!