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Shape and size of the universe
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Sergio
The universe expands in a balanced way between the speed and the density that dont make the universe to collapse, so this lead us to the flat shape
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Con claim 1
Izam
It cannot expand in a balanced way as like the source say, the universe doesn't expand indeed it streatch space. "The straight answer is that the universe doesn't expand into anything. There is no space "out there" for it to expand into. What the cosmic expansion does is stretch space itself, as if space were made of some kind of stretchy rubber material."
Izam