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.
victorz@lemmy.world 2 days ago
Imma go ahead and postulate that beyond the observable universe is a wall of anti matter, that keeps eating our universe’s matter and neutralizing it.
Prove me wrong! (Don’t.)
naeap@sopuli.xyz 2 days ago
Isn’t that the opposite of what we’re “seeing” now with the expanding universe and dark matter (not anti matter) being the reason for space to grow?
Anti matter and matter live inside the space, that dark matter is “producing”
At least that’s my layman interpretation of looking at some videos and reading some stuff
So, I have no clue ;-)
victorz@lemmy.world 1 hour ago
My mind just melts when I try to understand dark matter and an expanding universe. And I’m a big astronomy guy, I eat that shit up! I even grasp time dilation to some extent. But the expanding universe, I just can’t get my mind around it fully.
naeap@sopuli.xyz 37 minutes ago
Yeah, me too…