In terms of something which would markedly affect the whole globe and change the world as we know it, I think that would be a devastating solar flare/CME as kitty says above. It's also a real possibility. We're even being openly warned by NASA and the MSM of this possibility. Imagine most of the world's electronics and electrical grid wiped out........ it would be absolutely ruinous.
A lot of the tin type sites now are talking about how they have uncovered plans by TPTB to start a nuclear war and wipe most of humanity out. It would also clearly turn most of the planet into a wasteland. Some are claiming this is because TPTB are going to first GET OFF THIS PLANET - and have the means to do so. I don't think this story makes any sense. It only makes any sense if they are completely insane psychopaths - and I guess that possibility cannot be ruled out. Whatever - I think the human race has only a short time to get the lid back on Pandora's Box or we will fall into darkness forever through electronic fascism.
Re other dimensions, because of my experience in 1983 when I went to what I call "Paradise" for a few short minutes, I can offer a few thoughts. I haven't spoken to many people about my experience, but those I have generally believe I went to some "higher dimension". I only believe it was "Paradise" because my brain was programmed to recognise a "Paradise". The most overwhelming aspect of "Paradise" or what seemed to be this higher dimension is I could feel a different PULSATION/VIBRATION. Compared to this planet, it was like Paradise was somehow "alive" and this planet is DEAD.
It's one of those things which is almost impossible to find words for, but for example, the COLOURS were ALIVE, the WATER was ALIVE. This is a lousy analogy because it doesn't even begin to cut it but if you can imagine reading a beautiful book full of large coloured photos of birds "brought to life" and then looking at a photocopy of a photo of a sparrow which had been photocopied from an original photocopy a thousand times.....even that doesn't describe the difference.
But it was the JOY. There was this unbelievable feeling of absolute and complete JOY which somehow "vibrated" through everything, everything....I did not want to come back, no one would.
Now this is what some people would say is the odd thing, depending on how you look at things. I went there when my dog died, at the exact moments. That dog and me were inseparable and he meant almost "the world" to me. For all of his four and a half years where I went he went. There was this incredibly deep bond of love between us. I'm saying this because people are asking how do you get to this other dimension?
It seems to me it's something to do with LOVE. He died and went to "Paradise". Yes, evidently animal souls "ascend". Why wouldn't they? It's humankind who believe themselves superior, but I don't think humankind is superior to many, many animals and species and I saw many animals there, including my dog who I knew had "ascended" or I thought they were "in Paradise". . It would seem that because of my intense bond to him I was also able to "ascend" for those few moments. It's the only thing I know to explain it.
In the Bible it says "love is as strong as death".
I know it.
Love overcomes death. Love really is the most powerful "force" in the universe.