It has been noted many times in the literature that if one twin (Alice) stays on earth while the other twin (Bob) proceeds out into space at a high velocity as represented by the Lorentz factor, and then returns after a period of time, that Bob returns much younger than the stationary twin. The degree of his youth depending upon the length of the period of velocity and its proximity to the speed of c which he undergoes during his trip. He is said to be in 2 different inertial frames during his round trip, while the twin on earth is in the same inertial or