Regarding Universe Expansion: Does the fabric of SpaceTime play a role in regulating the expansion of the universe? And if so does anyone have any recommendation of intermediate readings that could help me to understand this role? Regarding String Theory: I know I haven't read eonough on this subject but I've got a conceptual block... A string to me is a complex structure. Yet this particular structure is suppose to be a fundamental thing. To me a point is a fundamental structure. I'm just having trouble conceptualizing I suppose. Any suggested readings here would be greatly appreciated as well.