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Do you believe that the "big crunch" theory will actually happen?

I am not sure exactly what you mean. If you mean is it possible that some day the universe will collapse back onto itself, then that will depend on whether there is enough mass in the universe to keep it together. At the moment there is not enough mass that has been seen or inferred, so the answer of today would be that the universe will probably never collapse back on itself. But, we could still find the extra matter, maybe. Many are looking for it.

Samuel P Bowen

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