Dande Lion Farmva

I’ve had many interesting reactions to my recent shipping service nigh inflation , this persuasion that the early on universe expanded exponentially in addition to thereby flattened in addition to smoothed itself. The perchance most interesting reply to my pointing out that inflation doesn’t solve the problems it was invented to solve is a flabbergasted: “But everyone else says it does.” Not similar I don’t know that. But, yes, most people who function on inflation don’t fifty-fifty acquire the basics right. Inflation flattens the universe similar photoshop flattens wrinkles. Impressive! [ Img Src ] I’m non sure why that is so. Those who I personally speak alongside pretty chop-chop grip that what I say is correct. The math isn’t all that hard in addition to the province of affairs pretty clar. The puzzle is, why in addition to then exercise hence many of them tell a floor that is nonsense? And why exercise they proceed pedagogy it to students, impress it inwards textbooks, i...

Galaxy slime. [ Img Src ] Physicists receive got gathered prove that space-time tin comport similar a fluid. Mathematical evidence, that is, but even so evidence. If this relation isn’t a coincidence, so space-time – similar a fluid – may receive got substructure. We shouldn’t beak of infinite in addition to fourth dimension equally if the 2 were distant cousins. We receive got known at to the lowest degree since Einstein that infinite in addition to fourth dimension are inseparable, 2 hemispheres of the same cosmic brain, joined to a unmarried entity: space-time. Einstein also taught us that space-time isn’t flat, similar a paper, but bent in addition to wiggly, similar a prophylactic sheet. Space-time curves unopen to volume in addition to energy, in addition to this gives rising to the upshot nosotros telephone band gravity. That’s what Einstein said. But turns out if y'all write downwards the equations for modest wiggles inwards a medium – such equally soundwaves inward...

The of late reported gravitational moving ridge detection , GW170817, was accompanied yesteryear electromagnetic radiation. Both signals arrived on populace almost simultaneously, inside a time-window of a few seconds. This is a big work for closed to alternatives to nighttime affair equally this novel newspaper lays out: GW170817 Falsifies Dark Matter Emulators Sibel Boran, Shantanu Desai, Emre Kahya, Richard Woodard arXiv:1710.06168 [astro-ph.HE] The observation is hard to explicate alongside closed to variants of modified gravity because inwards these models electromagnetic in addition to gravitational radiations go differently. In modified gravity, nighttime affair is non made of particles. Instead, the gravitational delineate felt yesteryear normal affair comes from a gravitational potential that is non the i predicted yesteryear full general relativity. In full general relativity in addition to its modifications likewise, the gravitational potential is described yeste...

As y'all in all probability noticed from the uptick inwards blogposts, I’ve finished writing the book. The publication engagement is laid upward for June 12, 2018. We convey a encompass picture now: as well as nosotros convey a webpage, where y'all tin preoder my masterwork . The publishing concern continues to surprise me. I convey no thought who wrote the text accompanying the Amazon page and, for all I tin tell, the offset judgement doesn’t fifty-fifty brand feel grammatically. Neither, for that matter, did I convey anything to create amongst the encompass image. But well, it’s dark, which is plumbing equipment enough. The mass is close the purpose of arguments from beauty, naturalness, as well as elegance inwards the foundations of physics, yesteryear which I hateful high unloosen energy physics, cosmology, quantum gravity, as well as quantum foundations. Or at to the lowest degree that’s what I thought the mass would hold upward about. What the mass actually is cl...

Srsly? Several people asked me to comment on a newspaper that is hyped past times phys.org every bit a examination of quantum gravity . I’ll brand this brief. First things first, why are you lot nonetheless next phys.org? Second, the newspaper inward inquiry is on the arXiv too is titled “ a real like newspaper was inward 2012 . It is right that noncommutative geometry plays a purpose inward many approaches to quantum gravity too it’s non an alone uninteresting idea. However, the variant that the authors desire to examination inward the newspaper is non of the usually discussed type. They desire the final result to move relevant for the center-of-mass coordinates, too then that it scales alongside the full mass. That supposition has no back upward from whatever approach to quantum gravity. It’s made-up. It is besides mathematically highly problematic. Third, I already spelled out in my review several years ago  that this is bogus (see department 4.6) too doesn’t follow...

Our Mathematical Universe: My Quest for the Ultimate Nature of Reality Knopf (January 2014) Max Tegmark exactly published his mo book, “ Life 3.0. ” I gracefully declined reviewing it, seeing that 3 years weren’t sufficient to complete his commencement book. But thusly reminded of my shortfall, I made some other endeavor in addition to hold upwards got to the end. So here’s a slow review or, if yous haven’t made it through inwards 3 years either, a summary. Tegmark is a cosmologist at MIT in addition to his commencement book, “Our Mathematical Universe,” is nearly the thought that the basis is non simply described yesteryear mathematics, but genuinely made of mathematics. I told yous 10 years agone why this is nonsense in addition to haven’t changed my hear since. It was thus pretty clear I wouldn’t live fond of Max’s message. But. Well. People similar Max don’t grow on trees. I own got much sympathy for his free-range ideas in addition to also, fifty-fifty though I’ve met hi...

Popper, upside-down. Image: Wikipedia. Popper is dead. Has been dead since 1994 to endure precise. But also his philosophy, that a scientific thought needs to endure falsifiable, is dead. And luckily so, because it was utterly impractical. In practice, scientists can’t falsify theories. That’s because whatever theory tin endure amended inward hindsight hence that it fits novel data. Don’t gyre your eyes – updating your noesis inward response to novel information is scientifically solely audio procedure. So, no, you lot can’t falsify theories. Never could. You could yet jibe planetary orbits amongst a quadrillion of epicycles or invent a luminiferous aether which but precisely mimics special relativity. Of course of teaching no ane inward their right heed does that. That’s because repeatedly fixed theories leave of absence hideously difficult, non to cite hideous, period. What happens instead of falsification is that scientists transition to simpler explanations. To endure fai...