Novikov's Self-Consistency Principle states that the universe cannot change the past, but it can change the future. This raises a few questions about time travel, paradoxes, and the nature of reality.
It's a rule of time travel that says if you try to travel back in time, you can't change the past. You can only change the future.
Well, it's not really a problem, but it's more like a paradox. If you can change the future, but not the past, then what's the point of even traveling through time at all? It's like trying to fix a broken clock, but not being able to turn the hands back.
Or, as some people say, "It's like trying to have a conversation with a time-traveling toddler."
You might run into the Predestination Paradox, where every event in the timeline is predetermined and can't be changed. Or the Granny Paradox, where you encounter your past self as a child and realize that you're actually the cause of your own existence.
Ha! You think you can just avoid them? Good luck with that. Just remember, the past is like a big, complicated puzzle, and you're just a little piece of it.
Of course, you can still have fun with it! It's not all about the rules, it's about the journey. Just be careful not to get stuck in a Bootstrap Paradox, where you create a time loop that's impossible to escape.
You can visit the References page, but be warned: it's a rabbit hole of information, and you might never come out.