I'm interested in doing a scientific experiment. I'd like to cum into a jar a handful of times and then seal the jar permanently in order to construct a cumjar terrarium. Ideally, I'd like to drop in along with it a handful of tiny samples from around the world to maximize the diversity of the lifeforms inside and have a higher chance at seeing interesting things instead of just a complete absence of life

Could anyone think of anything I could actually be testing so that I can write up a scientific paper on it when I'm done? Maybe something like an untested concept in experimental biology?