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I remember when i was reading on Einstein's relativity the idea of the universe wrapping around, and not having definite limits. The example given was that of people living on the 2D surface of a sphere. They can move about their universe without ever coming to an "edge of the universe". Given an expanding universe how feasible is this? Our 3D universe could wrap around using a fourth dimension, so we would never see an edge of the universe, but the universe would still have limits, the surface of the sphere mentioned above has a thickness (maybe infinitely small) but there must be a start and end points defining the thickness of that sphere, so we're not getting rid of the question of universe ending somewhere, even if making it a little easier to ignore.
If the universe wraps around, then supposedly radiation beamed off in one direction may meet us from the opposite direction assuming it's not significantly affected by gravity in its course. If the universe wraps around then some of the radiation reaching us may be older than we think. I think that given the age of the universe (depending on the size of course) it's feasible that if we're in a wraparound universe then some light has had the time to go around a few.
If the universe wraps around, then supposedly radiation beamed off in one direction may meet us from the opposite direction assuming it's not significantly affected by gravity in its course. If the universe wraps around then some of the radiation reaching us may be older than we think. I think that given the age of the universe (depending on the size of course) it's feasible that if we're in a wraparound universe then some light has had the time to go around a few.