I need to talk about wormholes again because the more i learn about them, the less normal reality feels.
like, the fact that they come out of actual physics?? not sci-fi. not just imagination. but straight up solutions to Einstein’s equations. spacetime can, in theory, bend so much that it connects two completely different points through a shortcut. which means the universe looked at distance and was like “optional.” and i just… excuse me???
they’re usually called Einstein-Rosen bridges, which sounds very elegant and respectable, but the idea itself is kind of chaotic. you’d basically have a tunnel through spacetime where you could in theory travel huge distances instantly. except obviously it’s not that simple. because the second a wormhole forms, it would collapse unless you had exotic matter to hold it open.
and exotic matter is one of those things that sounds fake but isn’t. it would need negative energy density, which we kind of see in tiny quantum effects, but not in any way that would let us build a cosmic shortcut. so right now, wormholes are stuck in this frustrating category of allowed by math, not confirmed by reality.
but it gets worse (better).
Because once you start thinking about wormholes, you can’t not connect them to the multiverse. like, what if they don’t just link two places in our universe, but two entirely different universes? different starting conditions, different histories, maybe even slightly different versions of you. which is both fascinating and something i probably shouldn’t think about at 2am.
also, time gets weird. like really weird. depending on how a wormhole behaves, you could theoretically end up with time loops or situations where cause and effect stop making sense. and every time this comes up in lectures, it’s followed by “but we’re not going into that,” which is honestly disrespectful because that is EXACTLY what i want to go into.
i think what i love about wormholes is that they sit right on the edge of what we understand. they’re not completely made up, but they’re also not something we can actually use or observe yet. they’re like physics hinting that reality might be way more flexible than we experience.