Universe

I recently read an article entertaining the thought if the universe is infinite, what is beyond the outer space.

I think currently we may lack the knowledge to answer this, but what we can do is propose theories based on facts and calculations.

Once we exhaust ourselves and no new theories arrive, we can move on to deduction approach, and tackle each theory.

In future we might get the capability to be able to measure curvature in outer space. (Maybe with bright lasers, and multiple capture points to see it)

Also with our increasing understanding of black holes, we'll close the gap between fiction and science.

Another thing I see is understanding the "micro". If we're able to find how "small" is the universe, we might find some clues about how "big" it is as well.