I am suggesting "Entropy." This is likely too technical a term for most. But maybe it will generate some Google searches.

I like Big Space - Little Space because it could have lots of different interpretations... a small object in a big space (like this example), a big object not fitting into a little space, a huge vista, a macro, a small object or objects dwarfed even more by a monstrous object (like this example), small spaces within a large space, little spaces filling a big space (like this example, a zillion miniature ravines creating a vast scene), etc., etc.

-Nik

I like the possibility of Entropy as a topic. Hope it gets enough votes, I think we could see many imaginative and creative entrees.