Questions regarding the space in which all mass is thought to exist.

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is there any theory or observational evidence that our universe is electrically neutral or not?

It seems our universe is neutral in large scale. There is CP violationwiki problem about matter and dark matter. Similarly is there any theory about whether our universe is electrically neutral? ...
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Isn't the expanding universe a violation of conservation of mass-energy?

Correct me if I'm wrong here. I have been told that the universe is expanding faster than the speed of light, but still, Einstein was not wrong about his claim that nothing can move faster than the ...