Is There an Edge to the Universe?

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To the average person it seems obvious that the universe must have an edge. Yet most cosmologists think that like a ball, or more likely a bagel, the universe has no end, other then a temporal one - a beginning and, perhaps, an end. But several scientists agree with the common man that there is an edge to the universe and they have some definite ideas about what is beyond the edge and how to prove their case.