主题：【原创】宇宙之外 -- 达萨

research of String Theory, there will be a one direction property emerge when the inflation stage starts at the beginning of the universe. And this is what we feel as time.

In regarding the acceleration of the expansion of the universe, most scientist think it is the space itself is expanding, and this can explain the acceleration of the expansion. However, what drives the space to expand is still a mystery, and it is called dark energy. One possible explanation is that the space itself is in a super cooled state and is going though a phase transition, just like super cooled water rapidly changes to ice, it will expand dramatically until the energy is used up

BTW, due to the immense increase of the size of the universe during the inflation stage, the visible universe is only a tiny tiny fraction of what the big bang created. There could be regions that are similar to our visible universe, or parts that are completely different. In this sense you can say it is a multiverse, or there exists parallel universes. But, in regard to our visible universe ,as the expansion speed exceeds the speed of light, they have no influence on us