  Most cosmologists—with the interesting exception of Hubble himself—came to the immediate conclusion that the red shift could only mean that the universe was expanding. Immediately the relativity theorists were able to interpret the expansion as a continuous change in the geometry of spacetime, which was thoroughly accounted for by the General Theory of Relativity. After over a decade of stagnation in face of the meager choice between just two models of the cosmos, Hubble’s observations spurred theorists on to the construction of a melange of new models, each vying in competition with the other.