It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.
Oakley (1979) suggested its development meant an almost complete re-writing of the evolution and cultural emergence of the human species.Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.There are over forty such techniques, each using a different radioactive element or a different way of measuring them.Social and academic controversy recently arose in response to the argument that Jeungdogaja (證道歌字), the metal type produced in Koryo, might be an earlier product than Jikjisimgyeongyojeol (直指心體要節), conventionally believed to be the first metal type ever manufactured, dated to 1377 A. The said issue of the metal types was preceded by a heated debate as to the authenticity of an art piece, Bbalraeteo (the Wash Place) painted by Park Su-geun, which was aucauctioned at KRW 4.5 billon, the highest price for an art auction in Korean history. In this context, the cultural and art historical importance and its associated monetary value have fuelled the row regarding when the object was manufactured and in what way the year of the piece’s production could be scientifically confirmed.
He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.