Do carbon dating
A favorite tactic of Young-Earthers involves citing studies which show trace amounts of Indeed, this results from a unique decay mode known as "cluster decay" where a given isotope emits a particle heavier than an alpha particle (radium-226 is an example.) This fact is extremely inconvenient and creationist literature, accordingly, usually does not mention it.
This method relies on the uptake of a naturally occurring radioactive isotope of carbon, carbon-14 by all living things.
In principle, this decay rate may be used to “date” the time since an organism’s death.
But the calculated dates will only be accurate if the assumptions behind the method are correct.
These include the starting conditions, the constancy of the rate of decay, and that no material has left or entered the sample.
Furthermore, if a sample has been contaminated, scientists will know about it.