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A comment on Do Neutrinos Explain Matter-Antimatter Asymmetry?. Parent comment

Re:Do Neutrinos Explain Matter-Antimatter Asymmetry? by outworlder on Friday July 29, 2016 @05:21PM (#12190119)
> Intergalactic void is so empty that next galaxy could be made of anti-matter (it probably isn't) and we couldn't tell.

But not completely empty and we should be able to detect matter-antimatter annihilations.

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Re:Do Neutrinos Explain Matter-Antimatter Asymmetry? by scotty79 on Friday July 29, 2016 @06:56PM (#12190671)
Might be hard from half of the universe away. We don't know how close is the nearest antimatter area of universe.

Galaxies can have gamma halos. It might be that intergalactic void is more egalitarian when it comes to matter-antimatter and it shows.

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