This is the kind of thing she said: What about Avi Loeb’s claim that the interstellar object `Oumuamua was alien technology? Loeb has justified his speculation by pointing towards scientists who ponder multiverses and extra dimensions. He seems to think his argument is similar. But Loeb’s argument isn’t degenerative science. It's just bad science. He jumped to conclusions from incomplete data.
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Hossenfelder: If you are standing still and then begin to walk, that does not only change your position in space, it also changes which direction you are going in space-time. You are now moving into a direction that is a combination of both time and space. Read More ›
Exotic particles that don't survive a news cycle. She shows how they’re artifacts of the fact that very large numbers often show what appear to be patterns but are just noise. Read More ›
She thinks the solution now is to combine dark matter with modified gravity. Now that will be a challenge. We kind of wish she would go back to denying free will and fine-tuning of the universe. Read More ›
Hossenfelder: If one adds 7 dimensions of space to our normal three dimensions, then one can describe all of the fundamental forces of nature geometrically. And that sounds like a really promising idea for a unified theory of physics. Indeed, in the early 1980s, the string theorist Edward Witten thought it was intriguing that seven additional dimensions of space is also the maximum for supergravity. However, that numerical coincidence turned out to not lead anywhere. This geometric construction of fundamental forces which is called Kaluza-Klein theory, suffers from several problems that no one has managed to solved.
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Rob Sheldon: Hawking did not get the Nobel, however, because he hung his hopes on the radiation emitted by BH--the so-called "Hawking radiation". And it was never observed. Sabine tries to explain why. But one argument that Sabine doesn't make, is that Hawking radiation may never have been observed because BH are themselves never observed. Read More ›
Hossenfelder ends by reminding us, re phosphine on Venus, that “ absence of evidence is not evidence of absence.” True, but that’s just a corollary of the fact that one can’t prove a negative. No, we can’t but that doesn’t prevent us from drawing reasonable conclusions. The proverb has been used to cover far too many situations where a more realistic conclusion would be “There is no particular reason to believe this.”
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Hossenfelder: It’s no secret that I myself am signed up to superdeterminism, which means that the measurement outcome is partly determined by the measurement settings. In this case, the cat may start out in a superposition, but by the time you measure it, it has reached the state which you actually observe. So, there is no sudden collapse in superdeterminism, it’s a smooth, deterministic, and local process. Read More ›
The people who don’t think complex numbers really exist would probably not be happy with quantum mechanics being even more non-local without them. But of course, if complex numbers really do exist, then immaterial things really exist. Not a good time to be a hard core materialist. Read More ›
Hossenfelder: You can approximate the laws that we know with a computer simulation – we do this all the time – but if that was how nature actually worked, we could see the difference. Indeed, physicists have looked for signs that natural laws really proceed step by step, like in a computer code, but their search has come up empty handed. Read More ›
Hossenfelder: First, you cannot transfer information faster than the speed of light with the quantum internet or with any other quantum effect. Read More ›
Hossenfelder: Today I comment on the recent claim that the black hole information loss problem is "near its end" and explain why this is nonsense. Read More ›
Also, let this sink in: Despite believing in determinism, Hossenfelder believes we should “decide” against a new particle collider… We can decide? On that account, to other naturalists, she is “anti-science.” Naturalism is weird like that. Eats its own. Read More ›