Most processes that we are familiar with are like sand in an hourglass.In exponential decay the amount of material decreases by half during each half-life. Wiens has a Ph D in Physics, with a minor in Geology.
The goal is to promote greater understanding on this issue, particularly for the Christian community.
Many Christians have been led to distrust radiometric dating and are completely unaware of the great number of laboratory measurements that have shown these methods to be consistent.
Many are also unaware that Bible-believing Christians are among those actively involved in radiometric dating.
He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.
He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.