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It's a very enjoyable read.

Have you considered adding a little note or link near the beginning of the article, indicating how you know these jets and so forth will do the work you need them to do? (Or, if you're not sure they will, laying out that uncertainty clearly?)

Apologies if this list is on there and I missed it.

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I'm curious what you mean by this. We already know with confidence that when feeding, black holes emit relativistic jets from their poles that reach distances of tens of millions of light years. How could those not affect the environment around them?

As far as if the SPECIFICS of how they work are exactly as the author surmises, I think that's something that has to come in the simulation phase once the theory is adopted and tested more thoroughly, and absolutely shouldn't be something a theory should have to establish before even being properly considered.

This is a physics thing, and it may well leave laypeople curious. But the specifics are the theory.

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