One half-life is the amount of time required for of the original atoms in a sample to decay.
Whenever the worldview of evolution is questioned, this topic always comes up.
Let me first explain how carbon dating works and then show you the assumptions it is based on.
Time since recrystallization is calculated by measuring the ratio of the amount of 40Ar accumulated to the amount of 40K remaining.
The long half-life of 40K allows the method to be used to calculate the absolute age of samples older than a few thousand years.
Basic Overview of Paleoanthropology History of the Old Earth Dating Methods Used in Paleoanthropology History of Paleoanthropology Evolutionary lines, trees, bushes, and species Ardipithecus&topic_subdb=Ardipithecus&subfield=Paleoanthropology" class="classnamegg" Potassium-argon dating or K-Ar dating is a radiometric dating method used in geochronology and archaeology.