User blog comment:Spartian300/media biasing on a massive scale..../@comment-8615800-20141101123341/@comment-1789156-20141102025033

Friedmann proposed a set of equations to govern the expansion of space in homogeneous and isotropic models of the universe, going off of what Einstein's equations of general relativity. It was Georges Lemaître however who proposed the theory of the expansion of the universe and proposed what would become the Big Bang theory of the origin of the universe.