I think we may be having a slight semantics problem here. You say that HOW is the big question, while I say that WHY is the big question. Well, to me the how is right in front of us. For example, back to Newton's gravity. How it works is clearly defined. He developed formulas and calculus to be able to say how things worked. So to me how is just the mechanical details of putting the parts together and coming up with a prediction. That is how to me. But why is a whole different story. Why gravity works is pretty much unknowable. We can point to GR and say "see, that is a better way to show how gravity works". But why it works that way is still a big mystery. To me all of science is basically a quest to determine HOW everything works. That is just a description of the way it all goes together and interacts. Why it goes together and interacts that way is a matter of philosophy.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.