system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible that there were, in fact, equal amounts of matter and antimatter created in the big bang and we just live in an area that consists of only matter?

I was taught that the big bang resulted in more matter than antimatter and no one knows why. Could it be possible that equal parts were created but not evenly distributed such that different pockets outside of the observable universe (or even, perhaps, within) wound up either entirely matter or antimatter?
gpt
It's possible, but unlikely.  If that were the case, there would be matter-antimatter annihilations along the boundaries of these regions, and these interactions produce gamma rays that should be visible from Earth.  We haven't seen any evidence of this yet.