Why Aren't We Made of Antimatter?

To understand why the universe is made of matter and not antimatter, physicists are looking for a tiny signal in the electron

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Because if we were made of antimatter, then that's what we would have declared to be matter, and it would still be the case that the stuff we're not made of would be the antimatter.
- And even then, the question would still be "Why did it happen the way it did?" which is what this question is really asking...
  
  Yes, question is valid, phrasing is biased and clickbaity.
Archive link for those who were paywalled.

I wonder if the universe does indeed have practically no antimatter, or if it's "hidden" in places that we didn't detect yet.
Because there were two big bangs. The first one was all the antimatter.

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