Background for Terrestrial Antineutrino Investigations: Scientific Basis   of Knowledge on the Composition of the Deep Interior of the Earth
  I present from a historical perspective a logical progression of understanding, related to the composition of the deep interior of the Earth, that comes from fundamental discoveries and from discoveries of fundamental quantitative relationships in nature. By following step by step the reasoning from that understanding, one might begin to appreciate what is not yet known that pertains to recent interest in geo-antineutrinos and also what should be investigated to further advance that understanding. 
J. Marvin Herndon