ONE ROCK BOI; A ROBOT BASED ON RADIOACTIVITY, WHICH IS AN UNSTABLE ATOMIC NUCLEUS LOSES ENERGY (IN TERMS OF MASS IN ITS REST FRAME) BY EMITTING RADIATION, SUCH AS AN ALPHA PARTICLE, BETA PARTICLE WITH NEUTRINO OR ONLY A NEUTRINO IN THE CASE OF ELECTRON CAPTURE, OR A GAMMA RAY OR ELECTRON IN THE CASE OF INTERNAL CONVERSION.