I'm an avid lover of science fiction, but the operative word is FICTION.
Some things are probable though yet to be proven. Some things might be thought possible though not likely. Some things, like parallel universes, are just entertainment.
Oh I don't know here, do we not all live in a semi-paralle universe inside out heads ????? Do we not dream of interacting with those that have died years before. Some have dreams that seem to become a warning, don't take that flight, or are rip roaring nightmares of things that could have happend but didn't, sort of like the outcome of an experience while awake -----A darn that was close time.
We have our awake mind and our asleep mind, in some people the two interact, sleep walking and talking in our sleep. On the other side are those who are awake but day dreaming.
This Anti matter is interesting, Neutrinos that we try to understand the piece of a split atom that no one knows where it went to. Is it possible that all atoms have this bit of anti matter within them undetected until the loss in weight is noticed when atoms are split ???
I still believe we are unique in this cosmos, the chances of 2 planets the exact same miles from a sun identical to ours and the progression of both planets and inhabitants at the same rate with the same results bothers me. The idea of finding a planet with elephants on it is outside my understanding.
I can go for the Visitors we have as coming from the future much easier then beliving they come from outer space.