queerlilhayseed

That is mesmerizing. Is some of the particulate in the video eggs (or hatchlings) that are becoming dislodged? Or is that all other debris in the water?

I think if we’re ever going to find an answer to “Why does the universe exist?” I think one of the steps along the way will be providing a concrete answer to the simulation hypothesis. Obviously if the answer is “yes, it’s a simulation and we can demonstrate as much” then the next question becomes “OK so who or what is running the simulation and why does that exist?” which, great, now we know a little bit more about the multiverse and can keep on learning new stuff about it.

Alternatively, if the answer is “no, this universe and the rules that govern it are the foundational elements of reality” then… well, why this? why did the big bang happen? why does it keep expanding like that? Maybe we will find explanations for all of that that preclude a higher-level simulation, and if we do, great, now we know a little bit more about the universe and can keep on learning new stuff about it.

Yes, kind of, but I don’t think that’s necessarily a point against it. “Why are we here? / Why is the universe here?” is one of the big interesting questions that still doesn’t have a good answer, and I think thinking about possible answers to the big questions is one of the ways we push the envelope of what we do know. This particular paper seems like a not-that-interesting result using our current known-to-be-incomplete understanding of quantum gravity, and the claim that it somehow “disproves” the simulation hypothesis is some rank unscientific nonsense that IMO really shouldn’t have been accepted by a scientific journal, but I think the question it poorly attempts to answer is an interesting one.

the realpolitik is in Corrections

That’s exactly the sentence that made me pause. I could hook up an implementation of Conway’s Game of Life to a Geiger counter near a radioisotope that randomly flipped squares based on detection events, and I think I’d have a non-algorithmic simulated universe. And I doubt any observer in that universe would be able to construct a coherent theory about why some squares seemingly randomly flip using only their own observations; you’d need to understand the underlying mechanics of the universe’s implementation, how radioactive decay works for one, and those just wouldn’t be available in-universe, the concept itself is inaccessible.

Makes me question the editors if the abstract can get away with that kind of claim. I’ve never heard of the Journal of Holography Applications in Physics, maybe they’re just eager for splashy papers.

Ah, so the differing spin (and mass) of the merging black holes they just detected indicate that at least one of them was already a second generation black hole, and is evidence for multi-generation hierarchical mergers. That makes sense.

Very cool paper and I don’t want to be the Internet Armchair Astrophysicist, but doesn’t the fact that we’ve already observed a merger show that second-generation black holes are a thing? Or is this evidence that BH mergers (and therefore second-gen BHs) might be more common than we previously thought?

The first trillion is the hardest I guess.