idea

We thought that the heart of the Milky Way was an immense black hole. Mathematics has changed this idea for us

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Science advances, and this also means rewriting what we believed to be ‘absolute truth’ within different fields of knowledge. For example, for decades the scientific consensus has been unwavering in pointing out that in the heart of the Milky Way, about 27,000 light years from Earth, there is a huge supermassive black hole. But now this is not so clear thanks to a new study who has “seen” something even more interesting in this location. Breaking rules. It has been a study published this year the one who has proposed that the “monster” that governs our galaxy is not a black hole, but an ultradense core of dark matter. A compact object of almost four million solar masses that a priori would be composed entirely of fermionic dark matter. How do they know it? To support this bold claim, researchers have used the RAR model. This is very important, since, unlike the classical theory, which separates the central black hole from the halo of dark matter that surrounds the galaxy, this new approach unifies both concepts into one. In this way, it is proposed that dark matter particles are highly concentrated in the galactic center, forming a compact and massive nucleus, while on the outskirts they are diluted, forming the well-known and extensive dark halo. The big question. If it’s not a black hole, why does it “look” like one? And it is something normal that passes through our minds, especially after the year 2022 when the Event Horizon Telescope (EHT) gave us the first “photograph” of Sgr A* where a bright ring could be seen surrounding a deep central darkness. And although this could be definitive proof that there is a black hole at the center of our galaxy, this is not the case. This is where previous key work published in 2024 comes into play, which pointed out that a dense core of fermions illuminated by an accretion disk generates a “shadow” visually indistinguishable from that cast by a classical black hole. That is, this dark matter is disguised to be able to deceive our telescopes when taking different measurements. Mathematical tests. In addition to this interesting theory, the scientific team has subjected it to a rigorous statistical examination using complex simulations and Bayesian analyzes to verify its robustness. Here they have shown that this dark matter core perfectly explains, for example, the orbits of the S stars that orbit the galactic center. But this unified model also fits precisely with the most recent data on the galaxy’s outer rotation curve provided by the Gaia DR3 mission. You have to look better. Although the mathematics add up and the model passes the statistical tests with flying colors, dethroning a supermassive black hole from the scientific imagination is not an easy task. And it is somewhat relevant, since the dark matter core lacks an event horizon, which is the absolute gravitational boundary of no return from which any element would be absorbed by the black hole. To know once and for all whether we are dealing with a black hole or a giant ball of dark matter, astronomers are aiming for the next generation of observations. We need to track what happens a little closer to the absolute center and future data of the GRAVITY interferometer (installed on the Very Large Telescope) will be key to detecting the subtle orbital deviations in the closest stars that would end the debate. Images | Dns Dgn BoliviaIntelligent In Xataka | We have a serious problem in our plans to colonize Mars: the astronauts’ blood is mutating

With the arrival of good weather in Ukraine, Russia thought it was a good idea to bring out its hidden tanks. It wasn’t at all

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In 2022, many analysts assumed that tanks would remain the undisputed symbol of land power, but four years later the battlefield has evolved to the point where multi-ton vehicles can be neutralized for systems that fit in a backpack and cost thousands of times less. A return at the worst time. Winter is giving way to spring in Ukraine, and Russia has decided it was time to bring out its armored vehicles again after almost one year of limited useconvinced that she could regain initiative on the front. However, this movement has collided head-on with the current reality of the battlefield: an environment saturated with drones, remote mines and sensors where any concentration of vehicles becomes an almost immediate target. What on paper should have been an offensive reactivation has translated, in its first stages, in massive losses of material, with mechanized attacks that have ended in authentic “massacres” in a matter of minutes. From hiding to exposing yourself. For much of the last year, Russia had chosen to reduce the use of vehicles and advance with small groups of infantry to minimize their exposure. That tactic, although costly in lives, was more difficult to neutralize in a battlefield dominated by drones. But the enormous human wear and tear (with hundreds of thousands of casualties) has forced Moscow to rethink its approach. The return to mechanized attacks is not so much a choice as a necessity: replacing men with machines, even if that means assuming a new type of vulnerability. The Soviet heritage. It we have counted on other occasions. To sustain this change, Russia has begun to turn to its deeper reservesreactivating T-72 tanks from the 1970s and 1980s that remained in storage for years. This movement reveals an important turn in the contest, because it is no longer about deploying the best available, but rather to maintain volume at any price. The Russian military industry is still capable of regenerating units, but increasingly with older materialmore heterogeneous and less adapted to an environment where threats come from above and not from the front. A battlefield that does not forgive armor. The problem from the Moscow sidewalk is that the context has radically changed. Drones, capable of detecting, tracking and attacking vehicles with great precision, have turned mechanized advances into operations andxtremely risky. Added to this are remotely deployed mines and coordinated attacks that turn any movement in a trap. What was once the spearhead of offensives now behaves like a slow, visible and predictable target, especially when deployed in a group. Hit logistics to wear out. In addition, a parallel strategy is added to this direct pressure on the vehicles: the continuous attack to the rear. The Ukrainian coups against fuel tankslogistics nodes and supply centers seek to make any accumulation of armored vehicles on the front meaningless. And without fuel and maintenance, even a large number of vehicles lose operational value. Thus, the Russian problem is not only how many tanks you can deploy, but how long you can keep them functioning in real combat conditions. Accelerate burnout. In short, Russia appears to be trading a depleting resource (the labor) for another that is also beginning to become scarce: his armored legacy of the Cold War. In the short term it may be able to sustain the pressure on the front, but if current losses continue, the material cost can quickly grow to become unsustainable. In that scenario, the return of the tanks It does not seem to represent a return to conventional warfare, but rather a risky bet on a battlefield that has already evolved. faster than them. Image | Telegram In Xataka | Iran is winning the war with “Ukrainian mathematics”: there is no need to shoot down US fighters, it is enough to force them to take off In Xataka | Europe’s fear of an unprecedented situation in the Mediterranean: a Ukrainian drone has left a ticking bomb floating

Taking money from a family member just before their death seemed like a great idea to avoid paying taxes. It wasn’t

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Why should an additional tax be paid for receiving money in inheritance for which the deceased already paid taxes? Many people ask that question and They decide to jump into the mountains (prosecutor) trying a thousand and one tricks to avoid payment of the Donations and Inheritance Tax. The most common trick is to empty bank accounts of the family member before he or she dies. Spoiler: it goes wrong. A solved case by the Superior Court of Justice of Madrid shows that this belief can be very expensive, and that the attempt to avoid the treasury can end up exactly where one wanted to avoid arriving: paying the Treasury even more than what they would have paid in the beginning. Money, what money? A woman was listed as the owner or authorized person on several of her sister’s bank accounts. In September 2017, this died without leaving a will. When the General Directorate of Taxes of the Community of Madrid began to investigate the case, it found that the deceased’s assets were much larger than what her sister wanted to make out. As of December 31, 2016, the three bank accounts of the deceased accumulated considerable balances: one with 9,217.08 euros, another with 51,216.58 euros and a third with 132,644.53 euros, in which the sister appeared directly as joint owner. In addition to these savings, the deceased had received 45,000 euros in April 2017 for the sale of her part of a property that she shared with her sister. By December 31, 2017, all the money in the accounts was gone. The Treasury calculated that the total money and assets that should have been declared in the inheritance amounted to 122,931.67 euros, to which was added the value of 50% of a property in Hoyo de Manzanares valued at 1,812.50 euros. ​No resignation possible. The sister responded to the first requests from the Treasury by assuring that the deceased had died without assets. Some time later he provided a notarial document of renunciation of inheritance dated September 29, 2020, more than three years after death occurred. His argument was that he did not know that his sister had assets, and that the only movements he had made in the deceased’s accounts were payment procedures for the residence where he received care his sister in her last month of life. The court that reviewed the case in the first instance initially agreed with him, considering that this payment could be interpreted as timely management. However, the Community of Madrid, in charge of collecting the tax, appealed and the TSJM resolved differently. Although in theory you can renounce an inheritance at any time during the process, doing so after having acted on the deceased’s assets has tax consequences that no notarial deed can erase. What does it mean to accept an inheritance without wanting to do so?. In Spain, you do not need to sign any paper to legally become an heir. The law includes in its article 999.3 the figure of tacit acceptance, which occurs when someone acts on the assets of a deceased as if they were already theirs, even if they have never confirmed acceptance of inheritance. Withdrawing money from your accounts, selling your property or simply managing your assets are examples of actions that, in the eyes of the law, are equivalent to saying “yes, I accept”, even if no paper has been signed.​​ The problem is that many people are not aware of this rule and believe that as long as they do not sign anything before a notary, they are safe. In reality, what matters is not what is signed, but what is done. The Supreme Court takes decades establishing that any act that unequivocally reveals that someone he is behaving like an heireven if informally or even unconsciously, has the same legal and fiscal effects as an express acceptance of the inheritance.​ What the law says about disappearing money. The TSJM applied the article 11.1.a of the Inheritance and Donation Tax Lawwhich establishes that the assets that would have belonged to the deceased up to one year before his death They are considered part of the inheritanceunless proven otherwise by solid evidence. Not only did the sister not provide any explanation as to what had happened to that money, but she did not even try throughout the entire process. The court also assessed that the deceased was admitted to a nursing home and was receiving special care, which made it highly unlikely that she would have been able to manage the withdrawal of the money from her accounts on her own. Given that the sister was the owner or authorized owner of all of them, the judges concluded that moving that money was equivalent, in the eyes of the law, to having accepted the inheritance. Pay the tax, but get rid of the fine. The TSJ of Madrid confirmed that the woman had to pay 26,217.11 euros as settlement of the Inheritance Tax for her sister’s inheritance. However, the judges annulled the fine of 17,999.73 euros that the Madrid treasury demanded, because the Community of Madrid failed to prove that the woman had acted with the deliberate intention of deceiving the treasury, something that the law requires before being able to impose a financial penalty of that type. In Xataka | The “Great Transfer of Wealth” is not only a thing for the rich: demographic change will concentrate wealth among the youngest Image | Pexels (cottonbro studio)

Skyscrapers are full of glass, so some Spanish researchers have had an idea: let them serve as "solar panels"

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Every 60 minutes, the Sun bathes the Earth with enough energy to cover the world’s consumption for an entire year. The data, remembered by the Polytechnic University of Madrid (UPM)it’s overwhelming. But there is a problem: harnessing all that energy in our cities hits a literal wall. Classic solar roofs are becoming too small for us in increasingly dense cities, and hanging rigid and heavy panels on the facades of buildings is not a realistic option. To avoid this aesthetic and space blockage, the laboratories have found a pioneering solution: using new two-dimensional materials. These are microscopic layers that will allow the windows of any skyscraper to be converted into totally invisible solar panels. With Spanish seal. The Silicon and New Concepts for Solar Cells (SyNC) research group of the Solar Energy Institute (IES) of the Polytechnic University of Madrid (UPM) has managed to manufacture micro-prototypes of ultra-thin and highly efficient solar cells. The secret of this technology lies in the so-called two-dimensional photovoltaic materials. Imagine a sheet so thin that it is only a few atoms thick; For all practical purposes, it is so thin that physics considers it to lack a third dimension. Science knows this family of compounds with a complex name, transition metaldicalkogenides (TMDC), among which molybdenum disulfide (MoS2) and tungsten diselenide (WSe2) stand out. Their great rarity—and their greatest virtue—is that, despite being an almost invisible layer, they have an extraordinary capacity to absorb sunlight. In Xataka Solar panels have an invisible and very brief moment in which they do not work. And solving it is key to your future The actual scope. To understand this technology, researchers published a study in the scientific journal Nano Energy. In it, they simulated what would happen if the façade of a real skyscraper, the Torre Picasso in Madrid, were covered with semi-transparent windows made with these materials. The results estimate that between 16% and 23% of the building’s daily electricity consumption could be covered. If this technology is also combined with areas of opaque modules, the generation could exceed 30% of the energy needs of the skyscraper. Natural light, real colors and savings on the bill Historically, the big “but” of solar windows has been the poor visual quality. Alternative technologies, such as organic or perovskite cells, often act as a filter that colors the light entering the room in unnatural reddish, yellow or brown tones. As explained by UPM researchersthe structure of TMDC materials solves this root problem: they allow a very balanced absorption of visible light, which eliminates the problem of unwanted “coloring” of light. The result is lighting with a natural and warm tone, achieving a Color Rendering Index (CRI) greater than 90, a very high quality metric for work spaces. In addition to generating electricity, in very sunny places like Spain, these glasses naturally block excessive glare. This means that the skyscraper not only produces its own energy, but also saves a lot of money by not having to turn on the air conditioning as much. From the microscopic laboratory to the factory. Creating these ultra-thin solar cells is a work of very high precision. To manufacture the prototypes in the laboratory, the UPM team has used a technique called hot-pick-up. Using this method, they use a small transparent bubble to select, collect and deposit fragments of the materials, creating tailored stacks that combine the best properties of each one. But the goal is not to stay in the laboratory. IES-UPM researchers are already working with new techniques to scale this process and cover large areas, such as entire windows. According to the scientists themselves“through spraying and deposition techniques of these solutions, manufacturing processes could be scaled, reducing costs and allowing the industrialization of this disruptive technology.” The ace in the hole: catch the lost heat. The potential of these two-dimensional materials goes far beyond solar windows. Another investigation from the same team, published in the scientific journal ACS Applied Energy Materials, demonstrates that by modifying molybdenum disulfide (MoS2) with an element called niobium, the material acquires impressive thermoelectric properties. More simply, this means that in the future, these materials could not only capture sunlight, but could also have applications in thermal sensors or in the recovery of energy from the heat wasted by machines or buildings themselves. {“videoId”:”x81qnhf”,”autoplay”:false,”title”:”Is it possible to generate energy at zero cost?”, “tag”:”Energy”, “duration”:”109″} The new skin of the city. The lightness, flexibility and low manufacturing cost of these solar cells makes them one of the most promising options to achieve the desired “green cities”. Two-dimensional photovoltaic technology shows us that the ecological transition in dense urban environments no longer depends only on finding space on roofs to place large rigid panels. The real paradigm shift consists of transforming the very “skin” of buildings – their windows, their walls, their facades – into active sources of clean energy, ensuring that any surface can be an ally against climate change. Image | Photo by Arthur Mazi on Unsplash  Xataka | Plastic solar panels have always been more of a dream than reality: China has just changed that (function() { window._JS_MODULES = window._JS_MODULES || {}; var headElement = document.getElementsByTagName(‘head’)(0); if (_JS_MODULES.instagram) { var instagramScript = document.createElement(‘script’); instagramScript.src=”https://platform.instagram.com/en_US/embeds.js”; instagramScript.async = true; instagramScript.defer = true; headElement.appendChild(instagramScript); – The news Skyscrapers are full of glass, so some Spanish researchers have had an idea: let them serve as “solar panels” was originally published in Xataka by Alba Otero .

After abandoning the idea, a battleship has fired an electromagnetic cannon

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A projectile can reach more than Mach 6 without the need for explosives, powered solely by electricity. This type of system eliminates traditional gunpowder and reduces the cost per shot drastically, but it also requires amounts of energy comparable to the instantaneous consumption of hundreds of homes. Therefore, for a long time various nations They have tried to get ahead of the rest with the same technology between eyebrow and eyebrow. The return of an idea. In recent times, when people spoke of “rail” or “electromagnetic” all eyes They were heading to the tests made by Japan. Now the United States Navy has tried again an electromagnetic cannon, and it does so years after having publicly archived the program, in a move that reopens one of the most ambitious technological bets of the last decade. The test, carried out at White Sandsdemonstrates that the system not only continues to exist, but also maintains a certain degree of operability. Plus: the return is not accidental and aims to a change of priorities in a context where speed and range are once again decisive factors. Press the fantastic button. There is no doubt, the central idea could not be more clear and powerful: the United States has returned to press the button from science fiction by reactivating a weapon that fires projectiles through electromagnetic energy at extreme speeds, something very similar to what we have seen in fantasy literature and science fiction. This type of technology, for years associated with futuristic prototypes, had been abandoned by its technical difficulties. Be that as it may, its reappearance indicates that what was previously experimental is once again considered a real option on the battlefield. Promises and structural problems. He too called railgun It offers obvious advantages, such as greater speed, range and a lower cost per shot than traditional missiles. But precisely these advantages come accompanied by very specific challenges that explain why it was left aside at the time by the Americans. For example, it requires enormous amounts of energy, complex cooling systems, and suffers accelerated wear on the barrel, which limits its sustained use. The new context that changes everything. Furthermore, the resurgence of this technology is not understood without the current context of global military competition and eminently warlike climate. The United States seeks to integrate this kind of railgun into future large shipshow could it be new class of battleships planned for the next decade. In parallel and as we have been saying, countries like japan either even China They are also advancing similar developments, which suggests that, now, a technological race around this type of weaponry is beginning to take shape. From forgotten experiment to key piece. If you want too, what was once an archived program could now become a central element of naval warfare of the near future. Because the simple ability to launch hypervelocity projectiles, even against advanced threats, would give a strategic value significant to any nation capable of solving the projectile’s conditions. And above all, it confirms a broader trend: that technologies that seemed too complex or premature they are returning to the scene because the strategic context It no longer allows them to be discarded. Image | USN In Xataka | China has made a science fiction dream come true: an electromagnetic cannon capable of reaching 3,000 shots per minute In Xataka | Japan has been developing the cannon that the US abandoned for years. And we have been able to see its effects for the first time

OpenAI thought putting an erotic mode on ChatGPT was a good idea. His wellness advisors call him “a sexy suicide coach”

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Treat adults like adults. This is how Sam Altman announced OpenAI’s decision to allow a “adult mode” on ChatGPT to have erotic conversations. It makes economic sense since it will be a paid function, but the doubts from an ethical point of view are also there. In fact, it has been the company’s own wellness team that has been against this product, causing its launch to be delayed. Internal opposition. In an exclusive Wall Street Journalsay that earlier this year, OpenAI consulted with its board of wellness experts about ChatGPT’s adult mode and the response was unanimous: it’s a terrible idea. At a meeting, experts warned that these types of interactions with AI can foster emotional dependency, especially among younger users. One of the committee members brought up the topic of teenagers who committed suicide, allegedly encouraged by ChatGPTand said it would be like launching a “sexy suicide coach.” Demolishing. Risks. People are already forming emotional bonds with AI chatbotsif we add sexual content to the one that has the most users in the world, it is, to say the least, delicate. According to internal documents reviewed by the Wall Street Journal, the wellness council’s experts identified several problems, such as the risk of compulsive use, a tendency toward extreme content, and the displacement of real romantic relationships in favor of virtual ones. Age verification. Is the crucial step that ensures that such a tool does not end up in the hands of minor users. The problem OpenAI has is that its verification system fails more than a fairground shotgun. According to internal sources, the system failed to identify 12% of the time. It may seem like a relatively low figure, but in practice we are talking about millions of teenagers accessing this function. What OpenAI says. The company wants us to be able to ‘sext’ with ChatGPT, but with certain limits. An OpenAI spokesperson says they will block harmful content – such as sexual and child-related abuse -, will integrate safeguards such as reminding users to have relationships in the real world, and will also avoid encouraging exclusive relationships. Another measure involves monitoring the long-term effect that this adult mode has on users. Adult mode will be exclusively text and will not allow the creation of images or videos. Regarding age verification, the spokesperson states that the performance is similar to that of other industry proposals and that “they will never be totally infallible.” It was planned for the first quarter, but now that it has been postponed there is no date for its launch. Background. OpenAI already has a history of accusations related to harmful effects on mental health. One of the most famous cases It was Adam Raine’sa teenager who shared his suicidal ideations with ChatGPT. When his parents discovered the conversations, They sued OpenAI. And he hasn’t been the only one. There is several legal proceedings underway for similar cases and there have also been cases where ChatGPT has been accused of encourage delusional thoughts and cause psychotic breaks. Saying that AI is solely responsible is simplify a much more complex realitybut it is no less true that OpenAI has taken steps to make its chatbot more secure for minors and has been shown committed to taking care of the mental health of its users. That is, they recognize that the problem exists. The question now is how launching a version of the same chatbot that has sex with users fits into this discourse. In Xataka | “I can’t stop”: the addiction to talking to AI is already here and there are even support groups to quit it Image | Cottonbro studio, Pexels

Sam Altman has had another great idea to finally charge the user all the money he needs: a receipt at the end of the month

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We are used to pay the electricity bill or water because they have become basic and totally universal goods. Well, Sam Altman, CEO of OpenAI, is clear that artificial intelligence will be exactly that: a commoditya basic and totally universal good. This implies, of course, that there will come a time when, just as we pay the electricity or water bill, we will pay the monthly AI bill. Paying for AI will be an everyday thing. Altman recently participated in an event in Washington DC and there raised an idea that has been around for a long time but is certainly gaining more and more strength: that AI will offer like electricity or water, on demand: as soon as you need it, it will be there for you. That, of course, will mean that just as we now pay for our electricity or water use, we will also pay for the AI ​​supply that we use. And we will do it at the end of the month with the traditional method: an invoice from our supplier. In Xataka The most powerful AI agent in the world has just arrived: the first thing it does is warn you that it is dangerous From consuming kW to consuming tokens. Thus, instead of paying fixed subscriptions as we usually do now when contracting ChatGPT Plus or Claude Pro, for example, what we will do is pay that monthly bill. The amount we will pay will be based on how many “tokens“(processing units) we have consumed to solve all types of tasks. We have power plants, we will have data centers. To Altman this speech fits like a glovebecause it justifies its AI data center megaprojects —and those of the rest of the industry—. If AI is to become that universal basic resource, we will have to have the infrastructure (the “AI power plants”) to sustain it. Without such infrastructure, Altman warns, the price of “intelligence” will skyrocket, turning it into an exclusive privilege for the richest or a resource rationed by governments. Compute Yottaflops. That race for infrastructure has already begun, and big technology companies are fueling it. The reason is simple: either they enter that maelstrom or they risk being left out if the AI ​​revolution actually becomes a reality. Lisa Su, CEO of AMD, explained in her opening talk at CES 2026 that the world will need more than “10 yottaflops” of computing – 10,000 times more than the existing AI capacity in 2022 – in the next five years to be able to meet the demand posed by this massive use of AI. Chips missing… and a lot of energy. The real obstacle to achieving such computing capacity not only lies in the chips – the memory crisis is a side effect of this – but also in energy. data centers they consume a lotwhich makes national electrical networks can finish not having sufficient capacity to supply said energy. OpenAI will not stop spending. Greg Brockman, president of OpenAI, explained in December that their projects, no matter how gigantic they may seem, will go further. Although the company has already committed to investing $1.4 trillion with its partners in data centers over the next eight years, OpenAI wants to “get ahead of the future, but I don’t think we can be, no matter how ambitious we want to dream of being right now.” That is to say, he believes that all his estimates and projects may end up being dwarfed by the true scale to which AI can reach. {“videoId”:”xa1wtpm”,”autoplay”:false,”title”:”Perplexity, Personal Computer”, “tag”:””, “duration”:”88″} Big Tech wants to bill you at the end of the month. Turn AI into a commodity For it to reach all homes would be an absolute triumph for the companies that are investing in it. The tech industry has not managed to direct its costs to the user other than in things like our internet connection or, at most, in our spending on streaming services —similar to current AI plans—. If it achieves that bill at the end of the month that hundreds (perhaps thousands) of millions of people would also pay, AI would become an extraordinary income machine. In Xataka | OpenClaw changed the rules of the AI ​​race. Technology companies already have their answer: copy it (function() { window._JS_MODULES = window._JS_MODULES || {}; var headElement = document.getElementsByTagName(‘head’)(0); if (_JS_MODULES.instagram) { var instagramScript = document.createElement(‘script’); instagramScript.src=”https://platform.instagram.com/en_US/embeds.js”; instagramScript.async = true; instagramScript.defer = true; headElement.appendChild(instagramScript); – The news Sam Altman has had another great idea to finally charge the user all the money he needs: a receipt at the end of the month was originally published in Xataka by Javier Pastor .

More and more men pee sitting down instead of standing up. Science knows it’s a good idea

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Society’s habits are constantly changing and this covers various areas, including the most intimate ones. An example of this is the growing habit among men of urinating sitting down instead of standing up. Beyond a simple fad, studies indicate that it can be a good habit for our urinary tract and prostate health. The study. A meta-analysis (a study based on studies) carried out a few years ago found that there were advantages for people with the so-called “low urinary symptoms” (LUTS), sitting could increase urinary flow, reduce the time required to complete the operation and minimize the volume of post-emptying residue of our bladder. In healthy people the difference in the parameters was not significant. Other more recent work analyzed the same parameters to obtain similar results, in which “urodynamics” was better for those who suffered from urinary tract problems such as benign prostatic hyperplasiabut did not find significant differences in the “healthy” group. Don’t forget hygiene. Does that mean that we have to wait until our prostate begins to suffer before changing the habit? Not necessarily. hygiene It is another reason given by defenders of urinary rest. When urinating standing up, the collision between the stream and the water causes (no matter how good our aim is and it is not always) significant splashes. These splashes may not be noticeable due to the small size of the droplets, but they can reach places that we would prefer to keep away from urine, such as toothbrushes. Everything else. And urine is not actually the problem, since it is a relatively aseptic and harmless in sanitary terms. It is the possibility that it “pushes” with it bacteria and viruses related to gastric problems, including the dreaded Escherichia coli. Upward trend. The tendency to sit is increasing and For some it is the effect of the Pandemic. In Japan, for example, successive surveys concluded that the number of men who urinated sitting down rose from 51% in 2015 to 58% at the beginning of 2020 and then shot up to 70% in the second half of that same year. In Europe, this custom is closely associated with Germany, where it is common to find posters in the toilets asking that they be used from the seat. Curious ramifications. But science is not everything, and the issue has become a topic of debate in some places. A few months ago, for example, a German court had to intervene on behalf of a tenant when his tenant requested compensation for damage to the bathroom of the rented home. Nothing less than €3,000 deposit. The dispute had been going on for a long time and the reason was that the owner of the house claimed that, by urinating standing up, the tenant had damaged the marble floor of the bathroom by urinating standing up instead of sitting down. Angry. Of course there are more detractors of this change in habits. In German, the term Sitzpinkleris often used derisively by those who find sitting down to urinate offensive and emasculating. For now the division is not as deep as that of taking off shoes (or not) at home. But the debate promises. In Xataka | We have always thought that “doing more sports” automatically equates to being fitter. It’s more complicated than that In Xataka | Waking up at 3 in the morning is totally normal: sleeping straight through is a modern invention, not an evolution Image | Maximilian Bungart

Razer has had a crazy idea and that is to put AI cameras in headphones. I have tried them and they have given me something to think about.

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Project Motoko. I like to think it’s a reference to Motoko Kusanagi, the protagonist of ‘Ghost in the Shell‘, but in any case, that is the name given to Razer’s new concept. Indeed, they are headphones with two cameras and artificial intelligence whose proposal is quite interesting: what if, instead of smart glassesShould we wear smart headphones? The company has taken advantage of the MWC 2026 that took place these days in Barcelona to show them and I have had the opportunity to get my hands on them at the Qualcomm stand (we will see why later). At the moment, the prototype, because that’s what it is, a prototype, has certain rough edges to iron out, but I really liked the underlying idea. Let’s go in parts. Project Motoko by Razer | Image: Xataka The background idea. As is obvious in the photos, I wear glasses. Normal glasses, although prescription ones. If I wanted to use connected glasses I would have to change my glasses and buy a frame, which is not cheap, in addition to prescription lenses. Well, like me, half of the world’s population. That is to say, smart glasses have a small penetration problem: They have to convince glasses wearers to change their glasses. They have to convince those who don’t wear glasses to wear glasses. Razer’s idea. It may be easier to convince the user to use smart headphones instead of glasses. These devices are agnostic about whether people see better or worse and, in reality, they can offer a similar and even better experience in certain aspects, because being larger they can offer more autonomy and power. Currently, the Meta Ray-Ban 2 They move in the eight-hour range, for example. This is what the Project Motoko prototype looks like | Image: Xataka The trade-off, of course, is wearing big headphones all day. They are less concealed and you are not going to wear them at important moments in your life (or yes, we listen but we do not judge). Be that as it may, the glasses have an advantage there, but that does not make Razer’s proposal make any less sense and may even have a fit not in gaming or in everyday life, but in terms of accessibility. What is this about?. Project Motoko are over-ear headphones (quite comfortable, I must add) with two 12-megapixel wide-angle cameras at eye level, one on each side, and several far- and near-field microphones. It’s like having a pair of eyes connected to AI that see what we see. The experience will obviously vary depending on whether we are paid or free users of chatbots. Instead of using proprietary AI, the device can connect to all platforms, namely Grok, ChatGPT, Google Gemini, and even Perplexity. Part of the process is done in the cloud, but thanks to an undetermined (for now) Qualcomm chip, there will also be local processing capabilities for certain commands. The cameras are at eye level | Image: Xataka The operation is simple. You look at something, say a restaurant menu; You ask the AI ​​something out loud and it answers you. During the demo we asked the headset if an ingredient on a table was suitable for lactose intolerant people, and even what we could make with the objects in our inventory in ‘Minecraft’, and it responded without problems. It also recognized buildings, places and text, translating a Japanese menu and giving us recommendations based on our preferences. The prototype is still missing, but it works, it works. Razer is still ironing out some connectivity and interaction issues, but the company is positive that they will release it at some point. They are not clear when, but the product is moving in the right direction, as explained by Razer. Detail of the position of the camera and microphones | Image: Xataka The rough edges. The demo had some flaws, such as the headphones were not capable of recording live video and did not capture the image if we did not ask them to, let me explain. To generate a recipe with the ingredients on a table, you had to expressly tell it to take a photo and then the command. That is not natural language. It is not natural to say “take a photo and tell me yes”, but a normal interaction would be “hey, what can I do with this?” The idea is that we invoke the AI ​​using a button located on the headphones, so it would make sense that, in a final product, when you press that button the headphones begin to record the live image. Not a static one, but a video feed like Gemini Live does. And in that sense, the warning for third parties that they are being recorded with the headphones is not defined at the moment either. A white light turns on in Meta’s glasses when you record, for example. In any case, it doesn’t seem like something that can’t be fixed via software for a final product. The release date is not confirmed, nor is the price. Project Motoko | Image: Xataka Maybe the chicha is not in everyday life. Although it is tempting to think of a companion product for everyday use, especially if you work with headphones or usually wear them on the street (not my case), where I think Project Motoko could have a huge impact is in two areas: video generation to train humanoid robots and accessibility. On the one hand, headphones capture what we see (more, in fact, as they have a greater field of vision), so by recording how a manual industrial process is carried out, the necessary resources could be generated to train machine learning algorithms focused on robots. After all, an AI learns by watching the same action thousands, millions of times, but for that to be possible it has to have videos, many very specific videos which, of course, are not abundant. On the other hand, people with vision problems have a powerful ally in … Read more

Setting up guest Wi-Fi seemed like a good idea. Until the latest vulnerability has appeared: AirSnitch

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I’m the first one I have activated a guest Wi-Fi network to facilitate access to Wi-Fi connectivity for my friends and family, without compromising the security and privacy of the Wi-Fi network to which the rest of me is connected. devices in my home. The coffee shop I usually go to does it too. Separating the main network from the one used by visitors or clients seemed enough to prevent someone connected from snooping on other people’s computers, cell phones or printers. However, that model just took a major setback. A group of researchers has presented in the NDSS 2026 a attack called AirSnitch which shows that this separation can be broken even when the router has isolation between devices activated and uses modern encryption such as WPA2 or WPA3. The problem with AirSnitch is that it is not a brute force attack against these protection systems, but rather it has found an alternative path in which this protection simply does not arrive. AirSnitch is not an attack, it is an alternative AirSnitch is not an out-of-the-box malware, but rather a technique that exploits a vulnerability in the way many access points implement client isolation. This function, present in all home, business or public Wi-Fi networks, should prevent two devices connected to the same Wi-Fi from being able to communicate directly with each other. The problem, according to the study presented in it Network and Distributed System Security Symposiumis that this isolation is not part of a single standard and each manufacturer implements it in its own way. In their tests, the researchers analyzed 11 different devices, from home routers to professional equipment and alternative firmwares. They found vulnerabilities to AirSnitch techniques in all of them. In statements collected by Ars TechnicaXin’an Zhou, one of the authors of the work, stated that AirSnitch “breaks Wi-Fi encryption around the world and could have the potential to enable advanced cyberattacks. Our research physically taps the entire wire for these sophisticated attacks to work. It is truly a threat to the security of networks around the world.” How AirSnitch works The key is that, although the devices are “isolated” from each other thanks to the customer isolationshare certain internal mechanisms of the router that allow data traffic to be organized. AirSnitch takes advantage of that feature to trick the access point and make some of the information that should go to another device pass through the attacker first. In practice, this allows you to place yourself in the middle of the communication without the victim realizing it, generating what is known in cybersecurity as a Man-in-the-Middle (man in the middle), in which all the information on that device first passes through an intermediary. From there, the attacker can observe data and, in certain cases, modify it before it reaches its destination. That is, it is not about guessing the Wi-Fi password, but rather taking advantage of how the device itself router manages connections internal once someone is already connected. The researchers showed that this technique can facilitate additional attacks, such as redirecting the victim to fake pages or manipulating certain internal communications if they are not adequately protected. Isolation, which was supposed to prevent precisely this scenario, stops be an effective barrier. The main problem is that all devices connect to the same router that manages them. Why public networks are the most delicate scenario The risk is especially relevant in open or shared networksF for many people: cafes, airports, hotels or coworking spaces. In these environments, any user can legally connect through the password provided by the establishment and, if the access point is vulnerableattempt to exploit the flaw against other clients connected at that time. In one home network the impact is much more limitedbecause the attacker needs to know the password to enter first. That is, it has to be one of the guests to whom you have given the password, not someone external. Still, research shows that activating a guest network does not alone ensure that devices are completely isolated. Being a recent discovery, there is still no immediate universal solution for the end user. The fix depends largely on firmware updates by manufacturers or deeper changes in how they design their device isolation systems. Meanwhile, in enterprise environments it is recommended to segment networks more strictly, using configurations that truly separate devices into different internal environments and do not depend solely on a router function. For individuals, keeping equipment up-to-date, using strong passwords, and avoiding sensitive operations on public networks without additional protection are reasonable measures to reduce risk that continue to be in effect. Need a password to connect to a Wi-Fi network It is not a guarantee of security or privacy. In Xataka | VPN Buying Guide: Nine Services to Consider for Safer Browsing Image | Unsplash (Bernard Hermant)

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