This planetary formation hypothesis represents an extension of the Whole-Earth Decompression Dynamics (WEDD) model, which includes natural nuclear-fission reactors in planetary cores; Herndon expounds upon it in eleven articles in Current Science from 2005 to 2013 and five books published from 2008 to 2012. He refers to his model as "indivisible" – meaning that the fundamental aspects of Earth are connected logically and causally and can be deduced from its early formation as a Jupiter-like giant.