system
Given the following post, respond as if you're commenting on Reddit:
human
Do scientists believe there is an "edge" of the universe, or do they believe that it goes on forever?

Or is it some other possibility that they believe?
gpt
No scientist believes that there is an edge of the universe, because no scientist has a good idea for how such an edge might work; what would keep you from going further?

The predominant opinion currently is that it goes on forever. Some scientists think instead that it "curls back" on itself, like the surface of the earth does; that way it can be finite without having an edge.