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Also is there still postulated an "anti-universe" someplace since there
is always antimatter produced when energy is converted to matter? If not,
where did the anti-matter go?
There is no reason to believe in the existence of an anti-universe.
There may be large isolates of antimatter in our observable universe.
Many physicists feel there are not, but there might be no observable
consequences if they do exist.
There are some observable consequences. If both matter and antimatter
galaxies existed in the same cluster, there should be strong gamma
emissions which are not observed. So if there is a significant amount
of antimatter in the universe, it must be segregated from the matter
on scales at least as large as 10^12 solar masses which would be
difficult to account for cosmologically.