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I am thinking, that the missing antimatter that was created at the Big Bang can be accounted for if we consider that it went the opposite direction in time (into the negatives)

IKnowNothing
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    @StephenG This is not a duplicate of that question. People have proposed bidirectional big bang models where there is a second region at $t<0$ (with a reversed thermodynamic arrow of time), and one of the justifications is that they supposedly explain the matter/antimatter asymmetry. It's been mentioned on Physics SE before. I'm failing to find any examples at the moment - "bidirectional" is apparently the wrong keyword. – benrg Mar 25 '21 at 04:48
  • @benrg It is a well known idea indeed +1 – safesphere Mar 25 '21 at 05:36
  • The term you are looking for this general issue is Baryon Asymmetry. The concept you are discussing is the idea of a mirror anti-universe. There is AFAIK no evidence supporting this idea. No idea if there were previous questions here. – StephenG - Help Ukraine Mar 25 '21 at 11:09
  • Thank you StephenG. The link to Baryon Asymmetry answered my question. – IKnowNothing Mar 25 '21 at 13:07

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