From the Editor's File of Important Letters:Entropy and the Expansion of the Universe

摘要

It is presently believed that,at scales of 10~(26)cm and more,the Universe is homogeneous (its matter is distributed evenly) and isotropic (uniform in all directions). The question is: "Why is there such homogeneity?" A candidate answer is: "Because an entropy process leads to homogeneity and isotropism."