There is, afaik, no explanation why there is more matter than anti matter, so maybe we just don’t see it
Like, dark side of the universe or something ;-)
This is the baryon asymmetry problem, and indeed, one of the proposed solutions is an “anti-universe” that flows backwards in time. The theory goes that all the antimatter travelled backwards in time while matter travelled forward from the Big Bang, creating a mirror anti-universe. However, there has been experimental evidence against this theory, as antiparticles seem to move forward in time, just like their matter counterparts.
There are a bunch more theories on how matter dominated the universe, like electroweak baryogenesis and leptopgenesis! Those are a bit more complicated though and are difficult to explain in an internet comment.
iirc the experiment was verifying that anti-matter falls downward in gravity? otherwise it still functions physically rather like time-reversed matter. Unless anti-matter is time-reversed and has reversed gravity in which case it would also seem to obey normal gravity because we would see it under the effect of anti-gravity but backwards?
This is the baryon asymmetry problem, and indeed, one of the proposed solutions is an “anti-universe” that flows backwards in time. The theory goes that all the antimatter travelled backwards in time while matter travelled forward from the Big Bang, creating a mirror anti-universe. However, there has been experimental evidence against this theory, as antiparticles seem to move forward in time, just like their matter counterparts.
There are a bunch more theories on how matter dominated the universe, like electroweak baryogenesis and leptopgenesis! Those are a bit more complicated though and are difficult to explain in an internet comment.
iirc the experiment was verifying that anti-matter falls downward in gravity? otherwise it still functions physically rather like time-reversed matter. Unless anti-matter is time-reversed and has reversed gravity in which case it would also seem to obey normal gravity because we would see it under the effect of anti-gravity but backwards?