How Do We Know That The World Wasn’t Destroyed?

The Large Hadron Collider is a particle smashing machine that is supposed to help scientists understand (or be able to prove) the so-called "Big Bang Theory", which in turn "could revamp modern physics and unlock secrets about the universe and its origins". That’s the upside. A lot of critics of the project thought that the LHC "could create tiny black holes of intense gravity that could suck in the whole planet". That would be the downside.

Apparently the thing was turned on and the world wasn’t sucked into itself, so they are going to go on to the next part of the project. I don’t understand any of it because I never had a single Physics class in my entire life. That’s part of the perks of being in the Business tract in high school, if Emmett Brown destroys the world, you wouldn’t know about it until it happened.

However, I’m not a total dolt and I like to think that I think deep thoughts at times. So my question is this: How do we know that the world wasn’t destroyed? If you think of reality as an organic thing, then it would have curative properties of its own. Something like the destruction of a world (or possibly the entire universe) could self-correct instantaneously and we wouldn’t know about it.

And what if there really are an infinite number of alternate realities that spin off of even the most minute of differences. For example, when I first started this post I called it the ’Large Hardon Accelerator" before correcting myself, but if I had typed it right the first time, then that would be a different reality. All of my current timeline leading up to the moment and leading out of that moment is the same, except for that one ten second span of time.

If the LHC (or LHA, if you prefer) were to destroy the world and theoretically the universe, then we wouldn’t know about it because it didn’t happen in this reality. I know there is no way to prove that something of that magnitude (or minitude), but that doesn’t mean it didn’t happen. Just because our understanding of physics says one thing that doesn’t mean that something else isn’t possible (and by our understanding, I mean someone else’s understanding).