Cindil Pindil

@MaryBowdenMD x.com/i/grok/share/8…

CDC has taken down ACIP recommendations from the Sept 18-19, 2025 and Dec 4-5, 2025 meetings where COVID and Hep B shots in babies were moved from "recommended" to "shared clinical decision making." Additionally, the recommendation that MMRV shots be separated to MMR + V in children under 4 is now gone.

@Tesla @tesla_semi Finally a pro-(Musk company) WSJ article.

Truckers love @tesla_semi

Any explanation @SecKennedy @POTUS ?

@MDBayNews @davidjtrone 😄

@davidjtrone Say no to David J. Trone!

For over 20 years, I've supported the ACLU's work. They have been critical in fighting for the rights of Americans and resisting the radical Trump agenda. In 2025 alone, the ACLU was able to file over 200 legal actions to delay and defeat Trump’s MAGA madness; that’s real resistance. They bring the fight to Washington, and after I’m re-elected, I’ll be right there with them.

@ExploreCosmos_ Interesting news regarding dark matter in galaxy clusters: x.com/skdh/status/20…

For decades, we’ve lived with a mystery that is deceptively simple: galaxies aren’t following the rules. When astronomers measure how fast stars orbit within galaxies, something doesn’t add up. The outer regions rotate far too quickly, as if there were much more mass present than we can see. If Newton or Einstein were entirely sufficient to describe what’s happening, those outer stars should be moving more slowly. In fact, many of them should be flying off into intergalactic space. But they don’t. Something is holding galaxies together. One way to explain this is to assume that there is additional mass, an unseen component we now call dark matter. It does not emit or absorb light, but it does exert gravity. In this picture, galaxies are embedded in vast halos of invisible matter that provide the extra gravitational pull needed to keep stars in orbit. But there is another possibility. Instead of adding something new to the universe, maybe the problem lies in our understanding of gravity itself. Perhaps the laws we use, so successful on Earth and in the Solar System, break down on galactic scales. This is where MOND (Modified Newtonian Dynamics) comes in. MOND proposes that gravity behaves differently at extremely low accelerations. With a relatively simple modification, it can reproduce the rotation curves of many galaxies without invoking dark matter at all. In that sense, it works remarkably well. But there’s an important nuance here. MOND is essentially an empirical rule, it tells us how galaxies behave, but not necessarily what underlying physical entity is responsible. Dark matter, by contrast, is a hypothesis about something real: a new form of matter that exists independently of the visible universe. And galaxies are only part of the story. When we look at galaxy clusters, the discrepancy becomes even more pronounced. The visible matter, mostly hot gas, is simply not enough to account for the gravitational effects we observe. Even with modified gravity, something extra still seems to be required. Gravitational lensing adds another layer of evidence. Massive objects bend light, allowing us to map where mass is located. In systems like the Bullet Cluster, something striking appears: most of the mass is not where the visible matter is. The gas from the collision slows down and lags behind, while the dominant mass component passes straight through. That’s a crucial observation. For many physicists, this is where the debate shifts, from “maybe gravity is wrong” to “something unseen must actually be there.” The early universe tells a similar story. The cosmic microwave background contains a detailed imprint of how matter was distributed just after the Big Bang. The pattern we observe matches extremely well with models that include dark matter as a distinct component. Reproducing that same pattern with modified gravity alone has proven extremely difficult. Then there is the question of how structure formed in the first place. Galaxies did not appear instantly, they grew from tiny fluctuations in density. Dark matter provides a natural explanation for this process because it does not interact with radiation, allowing it to collapse early and form the gravitational scaffolding that ordinary matter later falls into. Without dark matter acting as the cosmic “glue,” the universe simply wouldn’t have had enough time to assemble the galaxies we see today. Taken together, these observations point toward a consistent picture. Whatever is causing these gravitational effects behaves like additional mass, something that moves, clusters, and interacts gravitationally, but not electromagnetically. That is why most of modern cosmology leans toward the idea that dark matter is made of particles. Candidates such as WIMPs, axions, or other yet-undiscovered particles arise naturally in extensions of known physics, and experiments around the world are actively trying to detect them. Still, the story is not closed. Modified gravity remains an active area of research, especially because of its success on galactic scales. Some researchers are even exploring hybrid models that combine both ideas. But until we actually touch a dark matter particle, until we detect it directly, the case remains one of the greatest scientific whodunits of our time.

@skdh Not true: The researchers thus confirmed the predictions of quantum theory: The more information was obtained about the path (i.e. the particle nature) of light, the lower the visibility of the interference pattern was. physics.mit.edu/news/famous-do…

The double slit experiment is the probably most misunderstood experiment ever. I have no idea who created the myth that if you 'look' at one of the slits, then the particles (photons/electrons) stop behaving as waves. It's wrong! They of course STILL behave as waves! Because particles are also waves, always. Photons and electrons make a self-interference EVEN ON A SINGLE slit. Don't believe it? Below an actual measurement from a laser diffracting on a single/double slit from Wikipedia. What happens if you measure which slit the particle goes through is that you get no interference between BOTH slits. And no, you don't need a conscious observer for this. Believe it or not, there have actually been experiments where they had people literally look at a double slit to see if that makes any difference and the answer is no, it does not. The entire mystery of the double slit is in the path of the particle TO the double slit. Because it seems that the particle must "know" whether it WILL be measured at one of the slits before it even gets there. It must "know" whether to go through both or just pick one. Seems like the future influences the past? Not really, it just means you have a consistency condition on the time evolution.

@David_Ogawa @DJSnM Grok estimates the Orion+Vulcan cost to be $500 million per seat. Compare that to Crew Dragon + Falcon 9 at $70 million per seat.

@CPindil @DJSnM Artemis needs a capsule return from low Lunar orbit. At least until Starship earns full crew ratings for Earth landings from cis-lunar space.

With Orion being set for a Centaur V upper stage NASA could start launching it into LEO on Vulcan. Then there would be no need for Starliner, for LEO crew redundancy. And if a ferry stage were implemented to take it to the moon then SLS isn’t needed for Artemis. Boeing would not be happy.

@SawyerMerritt @SpaceX A welcome news, but why stop with SLS, Starship has 50+ times the pressurized volume of Orion.

NEWS: NASA is planning a bigger @SpaceX Moon mission role using Starship, in a massive blow to Boeing. With the new proposal, Boeing's SLS would no longer be used to boost Orion close to the moon. Instead, Starship and Orion would dock in Earth orbit, giving Starship the pivotal role of propelling the capsule to the moon’s orbit, before taking astronauts down to the surface. bloomberg.com/news/articles/…

@NGCNews @shieldaitech The Anduril effect

We flew @ShieldAITech’s Hivemind software on Talon IQ — a plug-and-play platform that cuts development time and speeds AI deployment. Learn more: news.northropgrumman.com/autonomous-sys…

@WallStreetApes Now they have to tap into their tens of millions - that will teach them

Senator John Kennedy introduced a Resolution to withhold senators pay during a shutdown He says it came out of the Rules Committee unanimously, it’s very popular and Senators will vote for it He says the problem is Leader John Thune won’t bring it for a vote “I've chased John like he stole Thanksgiving to try to get him to do it, but so far he hadn't agreed. But I, I'll keep pounding him” The problem in the GOP Senate is clearly John Thune. He’s definitely paid off

@JohnLeePettim13 What if you find it naturally? usgs.gov/news/national-…

Hydrogen is the stupidest, most ridiculous, and most impossible energy alternative. It takes 5 to 10 times more energy than it returns. This has been known since 2004, yet hydrogen refuses to die. It is far from renewable because it contains no energy at all—energy must be forced into it like a battery—and you lose even more when converting it back to electricity. It has the worst energy return of any alternative: far more energy goes in than you ever get back. Consider the process: you first split hydrogen from natural gas or use far more energy to electrolyze it from water, then compress or liquefy it, build extremely expensive and short-lived steel containers and pipelines (since hydrogen embrittles them), and finally deliver it to virtually non-existent hydrogen vehicles. Fuel cell technology remains far from commercial. It is also highly explosive. Hydrogen requires 12 times less energy to ignite than gasoline vapor, so the smallest spark or heat source can turn it into a bomb.

@visegrad24 🤦‍♂️

Trump writes about Iran’s attacks against the world’s largest gas field in Qatar: “Israel, out of anger for what has taken place in the Middle East, has violently lashed out at South Pars Gas Field in Iran. A relatively small section has been hit. The U.S. knew nothing about this attack, and Qatar was in no way involved or aware. Unfortunately, Iran did not know this and unjustifiably attacked a portion of Qatar’s LNG Gas facility. NO MORE ATTACKS WILL BE MADE BY ISRAEL pertaining to South Pars unless Iran unwisely decides to attack Qatar — in which instance the United States of America, with or without the help or consent of Israel, will massively blow up the entirety of the South Pars Gas Field at an amount of strength and power that Iran has never seen before. I do not want to authorize this level of violence and destruction because of the long term implications, but if Qatar’s LNG is again attacked, I will not hesitate to do so” It’s worth reminding people that Qatar has been cooperating closely with the Islamic regime in Iran for years on extracting gas from the South Pars Gas Field in the Persian Gulf. Iran, knowing that it’s more difficult for it to export gas as it’s under sanctions, lets Qatar extract its share and sell it. Qatar then shares the profits with the Islamic regime in Iran. It could be said that Qatar has paid for the construction of many of the Iranian ballistic missiles now striking Qatari gas infrastructure.

@Old_But_Gold50s m.youtube.com/watch?v=SsSALa… Bolero too

Vivaldi is always amazing ❤️

@Ellieinspace x.com/i/status/20339… 😄

Found this adorable cat outside in my backyard earlier. Should I bring him in for food? 🤪🤣

@alphafox How does he know am vs. pm 😂

GenZ is cooked

@RealJamesWoods @elonmusk God forbid - he will have to give up control of all his companies and SpaceX in particular.

Why isn’t @elonmusk also in charge of NASA?

Hawking radiation is yet to be observed. It is somewhat of a coincidence that the flash released from the evaporation of a mini black hole has never showed up in our telescopes. Grok calculated that for a black hole to evaporate within the life of the universe, its mass needs to be smaller than a large mountain or a small asteroid. E.g. the Moon would be 430 million times more massive than such black hole.

The Hawking Star is a theoretical concept born from the mind of Stephen Hawking himself. According to Hawking, black holes are not entirely black; instead, they emit a faint radiation, known as Hawking radiation. 1/ 👉 iopscience.iop.org/article/10.384… Video: YT/ PBS Space Time

I guess you are trying to give the simplistic explanation as there is nothing special about the event horizon to prefer antiparticles over particles. So statistically speaking, the effect of the particles/antiparticles falling behind the event horizon to the black hole mass over a long time will be 0. I haven't delved into the details to fully understand the cause of the mass loss.

Over time, this process leads to a gradual loss of mass for the black hole, eventually transforming it into what is now termed a Hawking Star. One of the distinctive features of the Hawking Star is its dynamic nature. 4/

@elonmusk It's good in certain tasks, but it trails behind in others (like software development, material science calculations). It's also slower and if you give it a problem, it tries to solve it with brute force instead of trying to diagnose it first.

What are your initial impressions of Grok 4.20? Major upgrades are still landing every week.