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JamesJM
of the theory that the universe is finite but there is no edge? Space is curved. That if you flew in one direction long enough you'd end up where you started.
If that's hard to comprehend just imagine driving around San Francisco. - JamesJM
Another is that because that's all there is, just the universe and nothing, if you reached one edge and continued, you would just instantly appear inside it again on the far opposite edge.
