A planet's geophysical conditions are a greater component of biological evolution on that planet than its environmental conditions. The combined synergistic effect of a planet's particular magnetic field and particular gravity field has a submolecular-level influence on organisms that induces specific mutations and genetic variations. Because of that, specific geophysical conditions unvaryingly direct evolution and speciation along and towards a specific pattern of physical development when added with a specific natural selection path caused by specific environmental influences such as a particular atmospheric composition and climate system.