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Is There a Finite Universe in the Cosmos?
Neil glew says the three spatial dimensions of the universe we live in could go on forever in all directions. If they did wrap round in one or more, with a circumference less than the size of the observable universe, we might be able to observe that. There's very active research programms to look for evidence of a finite universe in the cosmic microad background. But don't worry, we have figured it all out yourself. You an you can figure it out yourself.