Hello everybody! This is my first post! I was wondering about the fact that we have measure our universe to be flat very accurately. This means that it is also infinite and if it is infinite now it was infinite from the beginning! This means that at bb the time collapses but not the space right? With this in mind I am trying to figure out how the expansion took place... How it is possible to have a hot dense universe at the beginning which is also infinite? We say that every galaxy is moving away from the others so if we move backwards in time this motion leads us to a single point. How is that compatible with an infinite universe from its beginning? Thanks in advance for your answers.