re: If we ever managed to explore other galaxies, we'd never know about it...

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It sure does.

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Explain. Then book your flight to Stockholm to pick up your Nobel prize.

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It’s all theoretical. The show 3 body problem goes into it.

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I mean, that show is fiction. Faster than light communication is thought to be not possible.

The poster I replied to seems to think definitively that it is possible. It’s not. We don’t even have a hypothetical framework where it would be possible using entangled particles. In fact, we are pretty sure that FTL communication with entangled particles is not possible, sadly.

everyone involved in the project would have been dead for generations

Considering that the nearest galaxy is approximately 25,000 light years away, it would take 50,000 years to travel there and back at the speed of light.

To measure the dead in generations is a bit understated.

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Once they figure out the dimensions in the universe that keep two entangled particles connected regardless of distance, instant communication will be rather straight forward.

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Quite the quantum leap there. Either way, entangled particles do not allow FTL communication. It sounds like maybe you are saying the fact that entanglement exists means there is some property of the universe that we could exploit for FTL communication? But I can’t really tell, and I don’t think you know either.