I At one hundred and thirty, life was indeed gratifying for Titus McWorther. But for one missing detail, it would have been perfect. With his wife, Edna, he had planned well for retirement. His idyllic estate consisted of a second-hand planetoid, thirty miles in circumference, which was the only habitable piece of matter in its system. Complete with supplementary gravity generator, a compact atmosphere, a mantle of lush topsoil and a carefully selected biota, McWorther's World was both his delig