What does the universe consist of?

By the way, there is such a theory in philosophy... I won't say the name, as I might be wrong. But the essence is that there is no elementary, indivisible particle, just as there is no maximum accumulation of bodies. That is, the Universe is not the limit; there is an incredible number of such substances (if one can express it that way) that, instead, create something bigger. And so on... infinitely.