Potassium 40 fossil dating
These each have 19 protons and 21 neutrons in their nucleus.
Geologists have used this method to date rocks as much as 4 billion years old.Although, organic materials as old as 100,000 years potentially can be dated with AMS, dates older than 60,000 years are still rare.Paleoanthropologists and archaeologists must always be aware of possible radiocarbon sample contamination that could result in inaccurate dates.For a man who does not believe in a miracle, a slow miracle would be just as incredible as a swift one."*G. Chesterton (1925)."The theory of evolution gives no answer to the important problem of the origin of life and presents only fallacious solutions to the problem of the nature of evolutive transformations . We are condemned to believe in evolution, but we will always search for a suggestion concerning the methods of transformations . Perhaps we are now in a worse position than in 1859 because we have searched for one century and we have the impression that the various hypotheses [of how evolution could have occurred] are now exhausted.Presently, nature appears to be more steady, more firm and more refractory [resistant] to changes than we thoughtbefore we had made a clear distinction between hereditary variability [within species] and acquired characteristics [DNA characteristics fixing each species]. Salet, Hasard et Certitude: Le Transformisme devant la Biologie Actuelle (1973), p. Several methods for dating ancient materials have been developed.