Well this is going interesting places and as such I propose something to think about.

If their was nothing in the universe to observe it, would it (the universe) still exist?

A tree falling in a forest with no-one around still leaves evidence that can later be observed to indicate that it fell and therefore should have made noise according to our understanding of our normally observable universe.

Reminds me of Schrödinger's cat. Since observing the cat would kill it, and yet not observing the cat, it may live OR die, we just have to assume it is both alive and dead at once.

This is the kind of stuff I tend to go to sleep thinking about.

That and crazy questions such as "What does the universe exist within?".

May one day I will bear witness to the answer to that last one.

True. We are very limited in that we are stuck with what we witness and can only try to comprehend enough of it to put us at ease. I feel our greatest fear is the unknown.

All through history we have strived to bring some of the unknown in the realm of the known, to turn magic into science per se. The paradox is that the more we know, the more we realize there is that we do not know.