this post was submitted on 16 Apr 2025
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Given we are discussing going back in time 13.8 billion years, and being immune to any negative effects, I think we can go ahead and say that part is figured out by the magic time machine as well.
"being outside spacetime" is probably fine.
Also not a physicist either but that is my understanding as well, there was nothing, no space, no time, no up/down/left/right. And space is still expanding (albeit unevenly) all these billions of years later.
What's it expanding into? Nothing! At least as far as we know. Still waiting to bump up against the next universe bubble.