Extremely large - and small - things. Where does it - or does it - end?

Thoughts? First it was atoms, then we discovered there are smaller parts that make up atoms, then smaller parts that make them up, and so on.......does it have an end? What about the large end of the spectrum, with talk of "multi-verses" etc? Maybe it all folds back on itself like some weird cosmic mobius strip? ?

And most of all.......can any of it hope to stand up to Chuck Norris??