I think I'm correct in saying some recent telescope discoveries of the universe expansion rate have cast doubt on it. I'd have to go and find links.
Anyway, it doesn't explain what was there before.
I have no idea what the actual structure of the fabric of the universe is, wish I did.
All we have as humans is mathematical models of how parts of the universe work. We don't have any clue what's really going on. The maths that goes along with some of these theories is so extravagant that its that that often makes me doubt it can be correct. As an example, quarks. We have up, down, and even different 'colours' of them now. It's all made up as bad as religion is.