Imma wait to be excited about this, it's some kinda nonsense like gigantic atoms, with a hard candy shell made of bubbles but the energy of 10 suns idk man that's pretty out there
Well, black holes are pretty out there, too. Singularities don't really make sense with our current understanding of physics.
Also we can directly observe some really weird states of matter like bose einstein condensates, so I don't think this is ridiculous.
I mean physics is insane in general. XKCD had a video the other day that mentioned that if you had enough light/a strong enough laser, space itself stops being transparent because matter suddenly starts materialising out of nothing and blocks the light.
Its just a part in the equation where you're dividing by zero, that's all. We know you cant divide by zero, so it means our theories are incomplete.
The gravastar theory is notable (IMO) because it does away with the singularity. Although, it seems like this theory is borderline unfalsifiable, since any way you could detect a gravastar would also be insistinguishable from a black hole.
Personally, I am of the (completely unsubstantiated) opinion that black holes create universes (somehow) because it is a simple, succinct answer to many questions. So, any theory that takes that seriously would be worth further research, imo. But until there is some kind of observational evidence, I think this is just relegated to the realm of "that's a neat thing that math can do".
What's weird is I do! After decades of watching and learning I think we're a 3-dimensional species that can only mathematically measure things via 2-dimensional thinking. (We can only visualize space-time in a single plane for example mentally, honestly)
All the things that 'disappear into nothing' like singularities and even UFO's I think simply are 4th dimensional in nature if not higher. They dip in and out of what we can perceive and the beings that live there are amused at us crawling around like ants in an ant-hill.