The seven adjutant mind-spirits are relatively isolated on life-experiment planets.  Midwayers always appear in decimal or life-experiment planets. 
Life Carriers experiment with new patterns on decimal planets, new patterns of mechanical, chemical, and electrical mobilization at the time of their subsequent arrival with life transplantation and implantation mandates.  On life-experiment worlds, life designs vary more than on other worlds. This happens in one world out of ten.  Small dark planets are most suited to life experiments.  Tabamantia is the inspector for experimental planets in Satania. 
Urantia is sixtieth decimal planet in Satania. In all Satania there are only sixty-one worlds similar to Urantia. The two outstanding features have been: 
See also: UB 40:5.18.