Another "children"'s paradox.
The universe is very big. Where does it end? Is there a border? If there is an end, a border, than what is there beyond that border? and if there is anything behind that border, where does that "space" end? at what border? and so forth.
The opposite question is:
when we divide matter, we go back to molecules, atoms, nuclear particles, and so forth. Is there a limit to smallness? and if so: what is there in the space smaller than that?
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