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Comet C/2024 G3 (ATLAS) should be visible from the southern hemisphere, and possibly also the northern hemisphere, over the next few days

As the article by Matt Taibbi below notes, Mark Zuckerberg is moving his Meta platform–notably Facebook and Instagram–away from censorship and more towards free speech (click the link to read):

The video in this post has vanished from YouTube, but I found it on Facebook and put it below.  Do watch it.

Taibbi quotes a bit of it:

Meta CEO Mark Zuckerberg, in a video promising a shift toward free speech:

The US has the strongest constitutional protections for free expression in the world. Europe has an ever increasing number of laws institutionalizing censorship, and making it difficult to build anything innovative there. Latin American countries have secret courts that can order companies to quietly take things down. China has censored our apps from even working in the country. The only way that we can push back on this global trend is with the support of the US government, and that’s why it’s been so difficult over the past four years, when even the US government has pushed for censorship by going after us and other American companies.

The NYT adds a bit more:

Eight years later, Mr. Zuckerberg is no longer apologizing. On Tuesday, he announced that Meta, the parent company of Facebook, Instagram, WhatsApp and Threads, was ending its fact-checking program and getting back to its roots around free expression. The fact-checking system had led to “too much censorship,” he said.

. . . Eight years later, Mr. Zuckerberg is no longer apologizing. On Tuesday, he announced that Meta, the parent company of Facebook, Instagram, WhatsApp and Threads, was ending its fact-checking program and getting back to its roots around free expression. The fact-checking system had led to “too much censorship,” he said.

Now there is still an opportunity for counterspeech; fact-checkers will be replaced with “Community Notes,” similar to those used on X. There will be a policy to reduce “mistakes”, tackling “illegal and high severity violations” that are reported by others. People, rather than filters, will look for these violations and remove the ones deemed “not free speech.”

As I’ve said before, I would prefer large social-media platforms like Facebook and Twitter (now X) to adhere as strongly as possible to the First Amendment of the Constitution. That Amendment, of course, has carve-outs: truly prohibited speech. This includes defamation, harassment, false advertising, child pornography, obscenity, and speech liable to incite predictable and lawless violence.

So long as Facebook and X adhere to this policy, I think it’s a step in the right direction. The “Community Notes” will allow the counter-speech that advocates of free speech see as essential to promote the clash of ideas that, according to John Stuart Mill, will promote the emergence of truth. So I think this is a good step, regardless of what you think of Zuckerberg (or Elon Musk, who is running X this way).

I will be at meetings all day today, so I ask readers to discuss this new policy of Zuckerberg (and Musk).  Yes, I know people say that Musk and Zuckerberg are pandering to Trump,  and perhaps that is one motivation, but I do not want readers to concentrate on the people involved, but on the speech policy itself.

Please discuss below.  Do you think places like Facebook and X should prohibit speech that is actually allowed by the First Amendment? If so, which speech?

Or you can discuss Trump’s sentencing as a felon:

After months of delay, President-elect Donald J. Trump on Friday became the first American president to be criminally sentenced.

He avoided jail or any other substantive punishment, but the proceeding carried symbolic importance: It formalized Mr. Trump’s status as a felon, making him the first to carry that dubious designation into the presidency.

“Never before has this court been presented with such a unique and remarkable set of circumstances,” said the judge overseeing the case, Juan M. Merchan. “This has been truly an extraordinary case.”

The judge then imposed a so-called unconditional discharge of Mr. Trump’s sentence, a rare and lenient alternative to jail or probation. Explaining the leniency, Justice Merchan acknowledged Mr. Trump’s inauguration 10 days hence.

“Donald Trump the ordinary citizen, Donald Trump the criminal defendant” would not be entitled to the protections of the presidency, Justice Merchan asserted, explaining that only the office shields him from the verdict’s gravity.

The judge then wished Mr. Trump “godspeed” and departed the bench.

A more detailed understanding of the natural anti-insect protections of tomato plants can lead to better pest-management strategies

Insulin-producing cells injected into a man with type 1 diabetes have survived for a month so far without the need for immune suppression

When it comes to the weak nuclear force and why it is weak, there’s a strange story which floats around. It starts with a true but somewhat misleading statement:

• The weak nuclear force (which is weak because its effects only extend over a short range) has its short range because the particles which mediate the force, the W and Z bosons, have mass [specifically, they have “rest mass”.] This is in contrast to electromagnetic forces which can reach out over great distances; that’s because photons, the particles of light which mediate that force, have no rest mass.

This is misleading because fields mediate forces, not particles; it’s the W and Z fields that are the mediators for the weak nuclear force, just as the electromagnetic field is the mediator for the electromagnetic force. (When people speak of forces as due to exchange of “virtual particles” — which aren’t particles — they’re using fancy math language for a simple idea from first-year undergraduate physics.)

Then things get worse, because it is stated that

• The connection between the W and Z bosons’ rest mass and the short range of the weak nuclear force is that
  • the force is created by the exchange of virtual W and Z bosons, and
  • due to the quantum uncertainty principle, these virtual particles with mass can’t live as long and/or travel as far as virtual photons can, shortening their range.

This is completely off-base. In fact, quantum physics plays no role in why the weak nuclear force is weak and short-range. (It plays a big role in why the strong nuclear force is strong and short-range, but that’s a tale for another day.)

I’ve explained the real story in a new webpage that I’ve added to my site; it has a non-technical explanation, and then some first-year college math for those who want to see it. It’s gotten some preliminary comments that have helped me improve it, but I’m sure it could be even better, and I’d be happy to get your comments, suggestions, questions and critiques if you have any.

[P.S. — if you try but are unable to leave a comment on that page, please leave one here and tell me what went wrong; and if you try but are unable to leave a comment here too for some reason, please send me a message to let me know.]

The herbicide glyphosate is helping farmers adopt more environmentally friendly practices, and resistant weeds will make this transition more difficult, experts say

One of the things I have come to understand from following technology news for decades is that perhaps the most important breakthroughs, and often the least appreciated, are those in material science. We can get better at engineering and making stuff out of the materials we have, but new materials with superior properties change the game. They make new stuff possible and feasible. There are many futuristic technologies that are simply not possible, just waiting on the back burning for enough breakthroughs in material science to make them feasible. Recently, for example, I wrote about fusion reactors. Is the addition of high temperature superconducting material sufficient to get us over the finish line of commercial fusion, or are more material breakthroughs required?

One area where material properties are becoming a limiting factor is electronics, and specifically computer technology. As we make smaller and smaller computer chips, we are running into the limits of materials like copper to efficiently conduct electrons.  Further advance is therefore not just about better technology, but better materials. Also, the potential gain is not just about making computers smaller. It is also about making them more energy efficient by reducing losses to heat when processors work. Efficiency is arguably now a more important factor, as we are straining our energy grids with new data centers to run all those AI and cryptocurrency programs.

This is why a new study detailing a new nanoconducting material is actually more exciting than it might at first sound. Here is the editor’s summary:

Noncrystalline semimetal niobium phosphide has greater surface conductance as nanometer-scale films than the bulk material and could enable applications in nanoscale electronics. Khan et al. grew noncrystalline thin films of niobium phosphide—a material that is a topological semimetal as a crystalline material—as nanocrystals in an amorphous matrix. For films with 1.5-nanometer thickness, this material was more than twice as conductive as copper. —Phil Szuromi

Greater conductance at nanoscale means we can make smaller transistors. The study also claims that this material has lower resistance, which means more efficient – less waste heat. They also claim that manufacturing is similar to existing transistors at similar temperatures, so it’s feasible to mass produce (at least it seems like it should be). But what about niobium? Another lesson I have learned from examining technology news is to look for weaknesses in any new technology, including the necessary raw material. I see lots of battery and electronic news, for example, that uses platinum, which means it’s not going to be economical.

Niobium is considered a rare metal, and is therefore relatively expensive, about $45 per kilogram. (By comparison copper goes for $9.45 per kg.) Most of the world’s niobium is sourced in Brazil (so at least it’s not a hostile or unstable country). It is not considered a “precious” metal like gold or platinum, so that is a plus. About 90% of niobium is currently used as a steel alloy, to make steel stronger and tougher. If we start producing advanced computer chips using niobium what would that do to world demand? How will that affect the price of niobium? By definition we are talking about tiny amounts of niobium per chip, the wires are only a few molecules thick, but the world produces a lot of computer chips.

How all this will sort out is unclear, and the researchers don’t get into that kind of analysis. They basically are concerned with the material science and proving their concept works. This is often where the disconnect is between exciting-sounding technology news and ultimate real-world applications. Much of the stuff we read about never comes to fruition, because it simply cannot work at scale or is too expensive. Some breakthroughs do work, but we don’t see the results in the marketplace for 10-20 years, because that is how long it took to go from the lab to the factory. I have been doing this long enough now that I am seeing the results of lab breakthroughs I first reported on 20 years ago.

Even if a specific demonstration is not translatable into mass production, however, material scientists still learn from it. Each new discovery increases our knowledge of how materials work and how to engineer their properties. So even when the specific breakthrough may not translate, it may lead to other spin-offs which do. This is why such a proof-of-concept is exciting – it shows us what is possible and potential pathways to get there. Even if that specific material may not ultimately be practical, it still is a stepping stone to getting there.

What this means is that I have learned to be patient, to ignore the hype, but not dismiss science entirely. Everything is incremental. It all adds up and slowly churns out small advances that compound over time. Don’t worry about each individual breakthrough – track the overall progress over time. From 2000 to today, lithium-ion batteries have about tripled their energy capacity, for example, while solar panels have doubled their energy production efficiency. This was due to no one breakthrough, just the cumulative effects of hundreds of experiments. I still like to read about individual studies, but it’s important to put them into context.

The post New Material for Nanoconductors first appeared on NeuroLogica Blog.

Meanwhile, in Dobrzyn, Hili is optimistic, I suppose:

Szaron: We live in times when books are more important for cats than for humans.
Hili: Not for all of them, dear Szaron, not for all.

Szaron: Dożyliśmy czasów, w których książki są ważniejsze dla kotów niż dla ludzi.
Hili: Nie dla wszystkich, drogi Szaronie, nie dla wszystkich.

The microscope cost less than £50 to build using an open-source design and a common 3D printer

The classic Italian cacio e pepe pasta is notoriously tricky to get right, but physicists have come up with a trick to achieve a perfectly smooth cheese sauce

Defenders of the GBD won't tell you what it actually said. I will.

The post Defenders of the Great Barrington Declaration Neither Know Nor Care What it Proposed. The Deliberate Erasure of the We Want Them Infected Movement Has Succeeded. first appeared on Science-Based Medicine.

A series of more than 100 small earthquakes in Surrey in 2018 and 2019 might have been triggered by oil extraction from a nearby well, suggests a new study.

Electron transport in bilayer graphene exhibits a pronounced dependence on edge states and a nonlocal transport mechanism, according to a recent study.

Electron transport in bilayer graphene exhibits a pronounced dependence on edge states and a nonlocal transport mechanism, according to a recent study.

Scientists warn efforts to limit the long-term temperature rise to 1.5°C will fail as data confirms 2024 was the hottest year in human history

If you were Captain of the first USS Enterprise, where would you go!? Humanity is on the cusp of reaching out among the stars, maybe not just yet, nor in our lifetimes but it is just around the corner cosmologically speaking. A new paper explores the new technology that could make it a reality but also carefully considers the ethical aspects. Before we make the first journeys we need to be clear about the ethical considerations too so that our exploration is sustainable and responsible.

In 1961 Yuri Gagarin completed the first human spaceflight. In the decades that followed human visitors arrived on the Moon and countless probes have visited the planets. Exploring the stars is a challenge of another level but with theoretical concepts like nuclear propulsion and even warp drive it may not be so far away. Project Orion proposed nuclear powered spacecraft while Project Breakthrough Starshot proposed sending small spacecraft to the stars. The challenges are still vast but no longer insurmountable. 

Yury Gagarin before a space flight aboard the Vostok spacecraft. April 12, 1961 Credit: RIA Novosti

The human drive for exploration has meant the prospect of interstellar travel has always been the obvious next step. As the desire and technology finally start to make this a reality, the ethical debate must also begin as we consider the complex moral implications as we step out among the stars. 

In a fascinating paper authored by Florian Neukart, Professor of Quantum Computing from the Institute of Computer Science in the Netherlands, the focus is to explore the multitude of different elements to interstellar travel. This includes factual elements such as propulsion systems, habitat construction and life support and also sociological, ethical and philosophical issues too. Humans travelling to and exploring planets in our Solar System is one thing but just imagine travelling to and arriving at a world with alien inhabitants. Seems perhaps the stuff of science fiction but once we start travelling across the gulf between the stars, it becomes a real possibility. The paper underlines the deep need to consider all facets of interstellar travel. 

This artist’s impression depicts the exomoon candidate Kepler-1625b-i, the planet it is orbiting and the star in the centre of the star system. Kepler-1625b-i is the first exomoon candidate and, if confirmed, the first moon to be found outside the Solar System. Like many exoplanets, Kepler-1625b-i was discovered using the transit method. Exomoons are difficult to find because they are smaller than their companion planets, so their transit signal is weak, and their position in the system changes with each transit because of their orbit. This requires extensive modelling and data analysis.

Among the questions posed by the paper is the deeply emotive; Should we pursue interstellar travel given the unknowns, or might our resources be better spent addressing urgent Earth-bound challenges? To answer questions like this demands insights from physics, engineering, biology, ethics and social sciences.

The paper includes insight into the current technological capabilities in consideration of the current theoretical frameworks of interstellar travel. It discusses multiple possible technologies such as the Magnetic Fusion Plasma Drive, nuclear thermal propulsion, ion drives and even warp drives. Life support systems and habitat protection technology are also considered and discussed. 

Artist impression of a starship with warp drive (Credit : Alorin)

I feel however that, whilst the technology will undoubtedly get us to the stars, the debates about whether we should will continue for some time. One thing is for sure, the many different aspects of interstellar travel must be carefully weighed up and considered with suitable frameworks being established. Not only will this protect us as we extend our travels into deep space but it will protect environments and life that we come across along the way.

Source : Toward the stars: Technological, ethical, and sociopolitical dimensions of interstellar exploration

The post The Cosmos is Waiting for us to Explore. But we Should Choose our Path Wisely. appeared first on Universe Today.

Earthquakes that occurred near an oil extraction site in Surrey, UK, in 2018 and 2019 had been put down to coincidence, but a new analysis with an updated look at the geology of the area suggests the seismic events may indeed have been linked to drilling

The first known death from a bird flu virus in the US has sparked fears about another pandemic, yet the overall risk to the general public still remains low

Those were the words with which Christopher Hitchens began his best speech on video, but it also applies to the three fires raging around Los Angeles. They aren’t bad enough to endanger USC or our conference, but people are cancelling anyway. The sky is hazy and there’s a slight whiff of burning wood at USC, but no sign of smoke.

However, Luana flew into Burbank yesterday, which is closer to the conflagrations, and she took this photo, which she let me put up.

It’s very sad: 100,000 people have evacuated, and many people have lost their homes and everything in them.  My heart goes out to them.

Catalysts do several surprising things to assist with daily life -- from bread making to turning raw materials into fuels more efficiently. Now, researchers have developed a way to speed up the discovery process for a promising new class of these helpful substances called single atom catalysts.