idea

We have solved the problem of space junk by burning it. A SpaceX lithium trail just proved to be a terrible idea

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For decades, the aerospace industry has had a consensus solution to the problem of space junk: burn it. A fairly simple phenomenon that is based on the satellite reentry when it ends its useful life in the atmosphere so that it begins to suffer friction and completely disintegrates. But the reality is that we are facing a huge problemsince physics reminds us that matter is neither created nor destroyed. We have captured him. Science is realizing that we are not removing space junk, we are just vaporizing it into metallic aerosols that are changing the chemistry of our own sky. And the definitive clue to this problem was found on the night of February 19, 2025where a team of German researchers pointed a laser into the sky over Kühlungsborn. What they detected in this case at about 100 kilometers altitude, in the thermosphere, was something that should not be there, since there were large amounts of lithium. And it wasn’t there for no reason, since it just coincided hours before with the re-entry of a SpaceX Falcon 9 rocket which had disintegrated over the Atlantic between Ireland and the United Kingdom. Something new. The signal measured in this case was not very subtle, since was 10 times bigger to the usual concentration in that region, and this finding was collected in an article because it marks a great milestone: it is the first time that the metallic contamination released from a specific piece of space junk at the exact moment of burning has been observed “live” and from Earth. The metallic iceberg. The incident with this Falcon is not something isolated in our society, but is a symptom of the structural change we are experiencing. In 2023, a team of researchers already used different devices to be able analyze more than 50,000 aerosol particles in the stratospherewhich is the layer where our ozone layer resides, at about 15-30 km altitude. What did they see? Historically, the metals found in the stratosphere came from meteorites that entered our planet. But today it is estimated that 210 tons of aluminum per year in the atmosphere comes from the disintegration of satellites and rockets, compared to the 20 tons per year that vaporize naturally from meteors. But lithium is not the only metal in the atmosphere of our planet, since scientists have detected more than twenty elements, among which aluminum, copper, lead or silver stand out… This is something that does not fit with the normal composition of meteorites, but it does coincide with the materials that different aerospace companies use to create their rockets and satellites. There is no planning. The pace of launches has skyrocketed in recent years, and if today we are close to 10,000 objects orbiting the Earth, we have to know that only Starlink aspires to have more than 40,000 satellites in Earth orbit low. But the problem is that the useful life of these devices is short, so their inevitable fate is to end up vaporized over our heads. Its effects. Science here is quite clear that the effects of filling the stratosphere with these metals are currently unknown. But the projections suggest that we should not be calm because elements such as aluminum and copper are important catabolizers that can affect the delicate ozone layer. In addition to this, metallic particles can act as special condensation nuclei, altering the microphysics of polar stratospheric clouds. And if that were not enough, adding anthropogenic material to sulfuric acid aerosols changes their size and ability to scatter sunlight. Ironically, we are altering the reflectivity of the stratosphere, the same layer that some scientists want to use for climate geoengineering, without knowing what the consequences will be. The planetary limit. The models here suggest that, if the planned megaconstellations materialize, the fraction of stratospheric particles contaminated with aluminum from satellites will rise from the current 10% to around 50%. In other words, the load of metals in the stratosphere could grow by around 40% compared to natural levels. Here for years space agencies have assumed that disintegrating satellites was a completely harmless and clean practice. The example of the Falcon 9, which has validated the warnings of the scientific community, shows us that the Earth’s orbit and our atmosphere make up a connected ecosystem. In this way, launching tens of thousands of objects into space and then burning them on our own roof may be a solution to keep space clean, but we are dirtying the sky in return. In Xataka | Spain and Portugal have joined forces to launch satellites with a mission: to monitor catastrophes in real time

We don’t know what to do with the old coal mines. Switzerland’s idea is to turn them into a giant “battery”

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In the bowels of the Bierzo region of León, where coal was the absolute king for decades, the silence of the abandoned and flooded galleries is about to be broken. But this time there will be no pickaxes, no minecarts, no black ore. The new gold of the mining basin is water, and those in charge of extracting its potential come from the Alps. The Swiss energy company Alpiq has set its eyes on this ruined industrial legacy to transform it into a colossal natural “battery” that promises to be the energy engine of the future in Spain. A million-dollar purchase in El Bierzo. The news that has shaken the local and international energy panorama is the acquisition of the “CDR Navaleo” macroproject by the Swiss multinational Alpiq, as detailed in their press release. However, as local media describethis pumped hydroelectric energy storage project had initially been developed by Erbiergía, a company promoted and controlled by the well-known mining businessman Manuel Lamelas Viloria. Despite the sale, the Bercian promoter will maintain a stake in the company to continue collaborating and supporting its development on the ground. The project figures are colossal. Although two years ago the project has already obtained a powerful grant Of 35.5 million euros from the Ministry for the Ecological Transition (Miteco), the total investment necessary to build this megastructure is much greater. Now, as advanced in ElDiario.esthe estimated budget exceeds 300 million euros, but other sources raise the investment figure above 400 million, placing it in a range of between 420 and 450 million euros. And why Spain? To understand the magnitude of Navaleo, you have to look at the sky. Spain has very ambitious goals of penetration of renewable energies, such as solar and wind, but these sources are intermittent: it is not always sunny or the wind blows when we turn on the switch at home. Therefore, the electrical system urgently needs “storage and flexibility to guarantee the stability of the network,” explained by the Swiss company. That is where this plant comes in, which will contribute 535 megawatts (MW) of flexible capacity to the Spanish grid, according to local media. To get an idea of ​​its size, the current third vice president, Sara Aagesen, noted during a visit to the area that “all residential buildings in the province of León could be supplied with the annual production of this CDR from Navaleo”, as they have collected in The Economist. The impact transcends Spanish borders. To understand the phenomenon, the importance of infrastructure must be configured. The European Commission has included Navaleo on its list of Projects of Common Interest (PCI)highlighting its strategic value for the energy security of the entire continent, which also opens the door to better financing through the European Investment Bank. For the Swiss company, which has been operating in the Spanish market for 25 years, this is a major milestone: This is its first large-scale hydroelectric project outside of Switzerland. The engineering behind the “battery”. The technical mechanism is as fascinating as it is colossal. The facility will operate through a closed-circuit pumped hydroelectric energy storage system. In practice, it consists of taking advantage of groundwater from old mining operations, as explained in the local media. The system will pump water from the Tremor River area to a higher elevation, where it will be stored in a pond. When the country needs electricity, that water will be released through a large pipe so that it passes through a turbine and generates energy. This closed-loop design will provide the electrical grid with at least eight hours of uninterrupted energy storage, literally acting as an immense rechargeable water battery. But an abandoned mine? Used old coal mine poses obvious doubts about toxicity. Currently, abandoned mines are flooded and their waters contain minerals and contaminants. Far from being a problem, this is one of the greatest added values ​​of the project. The plant is called “CDR” precisely because it is a Reversible Treatment Plant. “Through our asset we are going to offer flexibility and storage, but we are also going to offer an environmental benefit. We are going to drain the contaminated water from the mines and purify it,” explains Amédée Murisier, director of Alpiq in statements to The Economist. In this way, an environmental liability and degraded land is transformed into a clean energy asset. Furthermore, viability is assured: the company already has a water concession granted for a period of 75 years, which guarantees long-term operational continuity. Forecasts and deadlines. The macroproject will extend through the Bercian municipalities of Torre del Bierzo, Castropodame, Congosto and Molinaseca, areas hard hit by the closure of mining. As for the deadlines, there are certain nuances. While the Viloria Group I hoped to start construction this year, the new Swiss owners apply their well-known precision and caution. Amédée Murisier warns that there is still a year and a half of work ahead to refine the geological studies and detailed engineering before making the final investment decision. What is certain, and what all actors agree on, is that the plant will enter commercial operation in the early 2030s. Where before Leonese miners went down into the bowels of the earth to extract coal with their pickaxes, in a few years thousands of liters of purified water will flow, pushed by Swiss technology. The Navaleo project is not only a work of pharaonic engineering; It is the perfect metaphor for the energy transition. A textbook circular economy that demonstrates how the old industrial ghosts of Bierzo can be reconverted, given a facelift and end up being the master key to ensuring the green and electric future of Spain. Image | freepik Xataka | Far from Grazalema and the reservoirs, Andalusia has another serious problem: completely collapsed mining ponds

Mercadona suppliers have invested 1.7 billion euros. That gives you an idea of ​​what a huge business it has become.

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when you want present your model Mercadona’s business strategy usually cites five pillars: “the boss” (the word used to refer to customers), its staff, society and capital. The fifth is his wide network of suppliers. That the Valencian chain includes them on that list is no coincidence. If it has managed to lead the sector until it has gained a business share that is already close to 30%, it is thanks largely to its bet on white labela wide catalog of articles impossible to articulate without a “industrial cluster” with 2,100 suppliers. As Mercadona grows they do it too, but that link is not free. In order not to lose step, they are forced to invest millions. One figure: 1.7 billion. The data has revealed it Expansion. Last year, Mercadona suppliers made investments in Spain and Portugal worth 1.7 billion euros. The figure is not only interesting for its volume, it is also interesting when put into perspective: it represents 31% more than the previous year, when the sum of investments amounted to 1,300 million. If compared to 2023, when ‘only’ 500 million euros were mobilized, the increase in investment is much greater, close to 240%. Of course, not all suppliers have spent the same nor do all the projects in which they have invested have to be 100% focused on Mercadona, although it is true that the chain is the main client of some of its suppliers. Who has invested the most? Mercadona has not yet presented its 2025 report, but we do have that of the previous yearwhich details the suppliers that mobilized the most investment and generated the most employment. At the head was Casa Tarradellas, which supplies Mercadona with ready-made pizzas and fuets for the Hacendado brand. In 2024 the Catalan company invested 104 million to build two new factories, dryers and production lines. The published data by Expansion show that in 2025 it once again led investment in the Mercadona supplier ecosystem, with the mobilization of 117.6 million. At the beginning of last year the firm presented a new mill for wheat flour in Gurb (Barcelona) that required 25 million of euros and throughout the year it also promoted a storage center of species. In 2024 Casa Tarradellas achieved increase 12% its profits to reach 38.4 million euros, consolidating the positive trend already registered in 2023. The result was largely possible due to the increase in income. An investment cluster. The list The greatest investment effort is completed by companies such as Vall Companys (70 million euros), Incarlopsa, Avinatur, Essity and Cañigueral, all four with investments close to 60 million, Covap (42.5 million) and Entrepinares (27 million). Names such as Familia Martínez, Huevos Guillén (50) and Elaborados Naturales (40) also stand out. Not all of that money has had to be allocated to projects focused on supplying Mercadona, but a review of the reports deposited in the Commercial Registry reveals that the supermarket chain has become the main client of its suppliers. In some cases the company founded by Roig actually represents more than 50% of all his income. “Joint planning”. The data is interesting because it does not only tell us about the resources that Mercadona suppliers have dedicated to strengthening their infrastructure and productivity. It also suggests that these companies are forced to make this effort to keep up with the Valencian chain, which in 2024 increased its turnover by 9%, to exceed the 38.8 billion euros. Looking ahead to 2025, it expected to continue growing and reach 40.1 billion. Although Mercadona has not yet presented its report for the past year, we do have studies that show that it has achieved increase your quota of business, moving away from rivals such as Carrefour or Lidl. As its sales grow and its catalog of private labels and ready-to-eat foods triumphs, the Valencian firm needs to rely on its “industrial cluster” of suppliers. Hence the urgency for them to strengthen their production capacity. “These investments are possible thanks to trust and joint planning,” they explain from Mercadona when remembering the 1.7 billion mobilized. Investment… and something more. That these companies are willing to dedicate millions and millions of euros to modernize their facilities, gain production capacity or expand is explained by a very simple reason: keeping up with the Valencian chain has become quite a lucrative business. Recently Five Days he wondered how the companies that supply it with products are doing and, after investigating the Commercial Registry, it found out that in 2024 the 20 main suppliers of the chain increased their sales figures by 18% to exceed 12,000 million euros. In total, aggregate profits grew by 5%, exceeding 360 million. Curiously (or not) at the top in billing volume were Casa Tarradellas, Incarlopsa, J García Carrión and Covap, with sales increases ranging from 12 to 29% between 2022 and 2024. Images | Mercadona and Wikipedia In Xataka | Mercadona and the rest of the supermarkets have realized something worrying: they spend a million dollars on printing paper

China has concentrated thousands of fishing boats off Japan, and its idea is not to fish

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The East China Sea is one of the more sensitive scenarios of the strategic balance in Asia for decades. territorial disputes, historical rivalries and the growing weight of new powers have turned these waters into a space where every movement is observed with a magnifying glass. There, apparently minor gestures usually fit into dynamic much deeperand China has just made a move. The diplomatic fuse. Japan’s detention of a chinese fishing boat within its exclusive economic zone, about 170 kilometers from Nagasaki, has rekindled a relationship already deteriorated between Tokyo and Beijing, with a certain island as a backdrop. He captain’s arrestafter refusing an inspection, occurs in a context of growing dispute marked by Japanese statements on Taiwan and the subsequent Chinese warnings its citizens to avoid traveling to Japan. Therefore, it is not an isolated episode, but rather the visible spark of a maritime tension that had been building for weeks. Images from space. AIS system data and the images by satellite show unprecedented concentrations of up to 2,000 fishing boats Chinese aligned near the median line between the two countries in the East China Sea. The formations, hundreds of kilometers long and with vessels separated by less than 500 meters, remained more than 24 hours in static positions despite adverse weather conditions. In other words, China was concentrating thousands of fishing boats off Japan, and its idea is not exactly to fish. The maritime militia and the “gray zone”. They counted on Nikkei that the vast majority of these fishing vessels are part of the so-called chinese maritime militiaa civil network that cooperates with the State and the Army in operations that do not reach the threshold of armed conflict. A priori, this strategy allows pressure to be exerted without formally deploying naval forces, thus making a direct response difficult. In other words, as we count A few weeks ago, what was presented as economic activity could become a test of maritime control or even the interruption of trade routes in the first island chain. Taiwan as a backdrop. Impossible to ignore it. The maneuvers coincide with statements by the Japanese government warning that a crisis in the Taiwan Strait would be an existential threat for Japan. Beijing, for its part, considers the island part of its territory and does not rule out the use of forcewhile Tokyo reinforces its deterrent posture. In this context, each movement in the East China Sea takes on a meaning that goes beyond fishing and is integrated into the regional strategic calculation. A pattern of sustained pressure. Furthermore, the activity is not limited to civil fleets. I remembered the Guardian that the Chinese coast guard has broken presence records around to the Senkaku Islandsalso known as Diaoyu in China, and has released images of patrols in disputed waters for the first time. Plus: the Liaoning aircraft carrier has expanded its radius of operations near Okinawa, while Beijing advances infrastructure on its side of the maritime median line. More than boats, an essay. Analysts interpret these concentrations like exercises of mobilization and coordination within the civil-military fusion plan promoted by Beijing. There is no doubt, the capacity of gather thousands of boats civilians at a strategic point in a short time sends a fairly clear message about the possibility of, for example, saturating maritime spaces without openly resorting to force. In this way, the pulse is no longer so much or only bilateral, but rather a warning to the entire region: China is perfecting tools to shape the balance of the Indo-Pacific, and it is doing so without firing a single shot. Image | Planet Labs, Marine Traffic, Anna Frodesiak, Micromesistius In Xataka | China’s best weapon doesn’t fire a single bullet: 300km ‘moving wall’ to close sea routes instantly In Xataka | China has turned deep-sea salmon farming into an engineering feat. This state-of-the-art boat proves it

We have been believing for years that intermittent fasting is the definitive weapon to lose weight. Science has another idea

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During the last years, the intermittent fasting has gone from being something exceptional to becoming a nutritional strategy that there is more and more talk and that it has more followers behind it. And it is no wonder, since the promise is quite seductive as it does not focus on what you eat, but on when you eat, activating different metabolic switches to accelerate fat burning. Although there are also detractors behind. New data. The Cochrane library, considered a great world reference, published a few days ago a great review about intermittent fasting that acts as a bucket of cold water, since it suggests that this diet does not offer superior benefits to conventional weight loss diets. The backup. We are not talking about a small study whose validity can be questioned, but in this case the Cochrane researchers analyzed 22 randomized controlled trials that added up to a total of 1,995 participants. overweight or obesity. The objective here was to compare different fasting modalities, such as going 16 hours without being able to eat with eight hours of eating, fasting on alternate days or 5:2 diet compared to classic calorie restriction or inaction. What they found is that, when pitting intermittent fasting against regular dietary advice, the difference in weight loss is virtually zero. The data. Getting into the matter, when intermittent fasting was compared With standard calorie-restricted diets, the mean difference in weight change was a minuscule -0.33%. This difference can translate into that intermittent fasting may result in little to no difference in weight loss with the traditional method. Regarding quality of life, such as the feeling of energy, no difference was seen and, regarding the levels of total cholesterol, HDL cholesterol and triglycerides, fasting did not prove to be a panacea either, yielding results of “little or no difference” compared to the control diets. The small print. One of the most critical points of the Cochrane review is the certainty of the evidence, which they rated mostly as “low” or “very low.” This does not mean that the studies are poorly done, but rather that there are important limitations, such as risk bias, inconsistency in results, and lack of precision. But there is one fact that should worry anyone who decides to opt for this diet independently, without medical advice, since, although the evidence is uncertain, some studies pointed to associated side effects specifically to fasting. These include headaches, nausea, cold intolerance or even insomnia and lack of concentration. What is not yet known. Perhaps it is the most revealing thing about this scientific study, since there are still many unknowns surrounding intermittent fasting that invite further research. In this case, none of the 22 studies included data on “patient satisfaction,” which is important because we don’t know if people prefer to go hungry for a few hours in exchange for eating more later, or if they hate the process. And being comfortable with a diet is essential so that you don’t abandon it halfway through. In addition to this, none of the studies pointed to the relationship that may exist in chronic diseases that require significant dietary control, such as diabetes, and which is very common in the population. But one of the big problems in science today is duration, since most studies lasted less than 12 months. We don’t know if fasting is sustainable or safe beyond a year. It is not a miracle diet. What we do know is that intermittent fasting works, but the key point is that It is not superior to the tools we already had as a calorie restriction accompanied by a balanced diet and exercise. For the average patient, this is actually good news: it means that the The best diet is the one you can stick to. If someone finds it easier to skip breakfast with a 16:8 fast than to count calories at each meal, fasting is a valid tool. But if fasting causes headaches, you’re not missing out on any “magic” metabolic benefits from eating three times a day. Although in this process the most important thing is always to be advised by personnel who are qualified in nutrition to be able to have the best dietary plan, to have real objectives and, above all, not to get frustrated along the way. Images | VD Photography In Xataka | We believed that a vegetarian diet guaranteed longevity. In extreme old age, the data says just the opposite

A Chinese driver rigged his car to drive alone while he was drunk. It wasn’t the best idea

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The Supreme People’s Court of China has had to come out to clarify what may have already seemed obvious: a driver cannot delegate all of his actions to a car with level 2 autonomy. Much less if that driver is traveling drunk and in the passenger seat, leaving the driver’s seat completely empty. As? Yes, you read that right. To Justice. History brings it CarNewsChinawhere they cover the case of a driver who was arrested for drunk driving… more or less. Because, really, he wasn’t the one driving. He was traveling in the passenger seat, with the small detail that no one sat in the driver’s seat. Wang Mouqun, a resident of Linping (a suburb of Hangzhou, a city with almost 12 million inhabitants), has been tried by the Supreme People’s Court of the People’s Republic of China, the most important court in the country, in the first case dealing with behavior related to road safety. The detainee has been punished with 45 days in jail for testing positive in the alcohol test. The decision comes after the driver had also received another sanction for the same reason in less than two years, which has aggravated the punishment. Nobody at the wheel. The truly curious thing about the case is that Mouqun had rigged the car so that the driving assistance system worked even if there was no one at the wheel. Thus, the owner of the car was able to sit in the passenger seat and sleep peacefully while the vehicle was driving without anyone at the wheel. In the Chinese media They talk about “an accessory installed to fool the system” but it is not clear exactly how it did it. What is clear is that the vehicle, a Aito M9drove with adaptive cruise control down the road without ever detecting that there was no human at the wheel. It is not the first case that has occurred in China either. of a driver who activates the driving assistance assistants to avoid driving under the influence of alcohol. What is new is that the Supreme People’s Court of the People’s Republic of China is in charge of handling the case. Level 2 autonomy. Cars like this Aito M9, with a autonomy level 2can circulate without human intervention but require a person to remain attentive to what is happening around them to take the reins at any time. In addition, they require keeping your hands on the wheel. Level 3 autonomy cars can drive without human intervention but, in Europe, only Mercedes is allowed to do so and in very specific circumstances. In fact, the system is so useless at the moment that the company has stopped offering it in the new Mercedes S Class. Between both levels there is an intermediate step known as autonomy level 2+, which does allow for some license. These systems are those that equip cars that, in addition to maintaining the adaptive cruise control system, can overtake cars on their own, just by activating the turn signal or even looking to the sides like BMW. Ford is the only company in Europe with which You can drive without hands on the wheel although the system monitors that the driver keeps his eyes forward. Responsible. What the Chinese Justice has decreed is that in any case, the driver is responsible, even if he was traveling in the co-pilot system and with the driving assistance systems activated. And although no risk situations derived from this way of acting were detected. In fact, the vehicle was kept in operation between 1:15 in the morning and 1:37 when the vehicle detected the trick and stopped the car by itself on the shoulder of the road. It was then that other drivers detected that something was happening and called emergency services. They tested the driver, who tested 114.5 mg/100 ml of alcohol in his blood. in Chinaexceeding 0.80 mg/100 ml of blood alcohol is punishable by a fine and exceeding 150 mg/100 ml is an aggravating circumstance. Above 180 mg/100 ml of blood alcohol is punishable by a prison sentence without parole, with exceptions. The Chinese court considers that Mouqun was ultimately responsible for what happened behind the wheel and that, therefore, he is guilty of both hacking the car and “driving” under the influence of alcohol. Added to a previous withdrawal of his driving license in 2024, the driver has received the aforementioned penalty of 45 days in jail and a fine of 4,000 yuan (about 490 euros at direct exchange rate). Photo | XHBY.NET In Xataka | Fine of up to 1,000 euros for a beer: the DGT prepares the definitive attack against alcohol and it is called rate 0.2

In 1968 a man had the idea to create the first tablet in history. The problem is that he was decades ahead of his time.

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If I tell you to think of the oldest tablet you remember, you may go back to the first iPad, which was released in 2010 (and, by the way, I turned seven last week). Or, if you’ve been following the world of technology since before the turn of the century, you might be familiar with the Microsoft Tablet PC from HP Compaq that was announced in 2001. In reality, there was someone who already tried to create one and it was much earlier, in 1968before the term “tablet” was even coined. At that time, Alan Kay was a young worker at the Xerox Palo Alto Research Center who had been mulling over the concept of a personal computer for some time (in contrast to the military, business and professional use that reigned among manufacturers at the time). After speaking with other colleagues who were beginning their research on how the programming language Logo could help younger children advance in math, Kay came up with an idea: “This encounter finally made me see what the real destiny of personal computing was going to be. Not a personal dynamic ‘vehicle’, as Englebart’s metaphors had it as opposed to IBM’s ‘railway tracks’, but something much deeper: a dynamic personal ‘medium’. With a vehicle, one could wait until high school to take ‘driving lessons’. But if it was a medium, it had to extend into the world of childhood.” In 1968, Kay created the Dynabook conceptwhich he would spend several years profiling. in the book “Tracing the Dynabook: a study of technocultural transformations” They define it like this: “Kay called it the Dynabook, and the name suggests what it was going to be: a dynamic book. That is, a medium like a book, but one that was interactive and controlled by the reader. It would provide cognitive scaffolding in the same way that books and print media had done in recent centuries but, as Papert’s work with children and Logo had begun to demonstrate, it would take the advantages of the new computing medium and provide the means for new kinds of exploration and expression.” “A personal computer for children of all ages” With the idea of ​​its function clear, Kay then began to shape it into cardboard prototypes (as can be seen in the image at the top of the article). In 1972, the researcher presented his paper “A personal computer for children of all ages” in which he offered more details not only about his motivation and his vision of personal computing at the time, but about the own device that I had in mind. His idea was to get a kind of tablet-shaped personal computer aimed at education. This would have a reduced thickness, a liquid crystal touch screen and a keyboard. Like a regular notebook in size, with a graphical interface (a revolution for the time) that allowed the reproduction of graphics, music and text, and with internal storage for 500 pages. The keyboard would not be the only way to enter information: it could also be done via voice. In the image that Kay drew, the word “stylus” can also be seen, although he did not comment on it in his paper. Kay’s idea is that the Dynabook that could be connect to other systems to “copy” information to it (among them, the ARPA Network) and even predicted the existence of content “vending machines”, which could not be accessed until payment had been made. “The books can be installed instead of being bought or loaned,” he said. Regarding digital “ownership”, Kay said the following: “The ability to easily make copies and own the information yourself is not likely to weaken existing markets, as has happened with xerography, which has strengthened publishing; and just as tapes have not hurt the music industry but have provided a way to organize one’s own music. Most people are not interested in being a source or a smuggler, but rather like to trade and play with what they have.” According to Kay’s calculations, the components to manufacture it could cost $294, so it was not unreasonable to be able to sell it for $500, something expensive for the time. “The average annual amount spent per child on education is only $850,” he said, and that is why he even proposed a different financing model: “perhaps the device should be given away as if it were a notebook, and only sell the content (cassettes, files, etc.). “This would be quite similar to the way TV packages or music are now distributed.” “Let’s do it!” he said to finish his paper. Unfortunately for Kay, the Dynabook never materialized. Despite Kay’s enthusiasm, the Dynabook itself was never manufactured for lack of support at Xerox and due to the technological limitations of the time. Do you remember what computers were like then? Well, imagine what it would be like to build a tablet. Two Xerox PARC engineers, Chuck Thacker and Butler Lampson, asked for permission to try to replicate a similar machine on their own, and so it came to light. Highwhich was also known as “Interim Dynabook”. It was not a tablet, far from it, but it maintained some of the ideas that Kay had raised in her publication. He Xerox Alto was one of the first personal computers of history and Steve Jobs and Apple engineers they were inspired in some of its innovations and concepts, such as the use of a graphical interface for its own computers. Starting at Minute 2:27, the Xerox Alto graphical interface in action Kay is not only remembered for the Dynabook itself, but for the educational vision he gave to the project, for his peculiar vision of the personal computing paradigm and for how he came to anticipate some of the problems (and even technologies) that would come later. Not only that: in 2001, Microsoft presented its Microsoft Tablet PC, a project that Chuck Thacker and Butler Lampson had led. Yes, the same ones who once tried to implement … Read more

Using facial recognition to hunt for copycats seemed like a good idea. This Valencian university has just discovered that it was not

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Educational centers that decide to do online exams face a challenge: without being able to monitor students in person, how do you ensure that they do not copy? A Valencian university found the solution with a sophisticated video surveillance and facial recognition system. Well, the joke has paid off. Resolution. In the summer of last year, the Spanish Data Protection Agency (AEPD) filed a complaint against the International University of Valencia o VIU for the use of facial recognition and recording to conduct online exams. As reported in À Puntthe resolution has already arrived and the VIU is going to have to pay 650,000 euros The system. In the VIU evaluation regulationsit is detailed that a “facial recognition technology system” will be used in the online tests. This system consists of the use of two cameras (which the student must provide), one to monitor the student and another for the environment, ensuring that there are no other people in the same room. The software is constantly capturing and analyzing images in real time to verify the student’s identity through AI. At the same time, the program is responsible for controlling the screen and even the devices connected to the computer with which the test is carried out. Two fines. The 650,000 euros are actually the sum of two fines. The first, of 300,000 euros, is for having failed to comply with the article 9 of the GDPR which prohibits the processing of biometric data with few exceptions. The second, which amounts to 350,000 euros, is due to a breach of the article 5.1c of the GDPRwhich maintains that personal data must be “adequate, relevant and limited to what is necessary.” The AEPD considers the use of facial recognition for this purpose to be disproportionate. Consent discarded. One of the exceptions to article 9 of the GDPR and which the VIU tried to rely on is that “the interested party gave explicit consent.” It is true that the students had agreed to use this control system, the problem is that they were not given any alternative: either they accepted, or they did not take the exam. The AEPD does not “consider the mandatory acceptance of general conditions upon registration to be valid consent”, which is why it rules it out in its resolution. The VIU also tried to take refuge in the “essential public interest”, another of the exceptions of article 9, but the AEPD has rejected it because there is no specific law for the processing of biometric data in the educational context. The university invoked the university law that says that universities must verify that students have acquired a series of knowledge, but the AEPD has also rejected it as insufficient. Wow, we have to pay. It’s not just the VIU. There is other universities such as the European University, Isabel I, La Rioja or Burgos that also use similar systems that combine cameras and facial recognition. During the pandemic there was no choice but to opt for online training and this prompted the appearance of video surveillance systems in exams, which raised the eyebrows of the AEPDwhich in 2021 already warned that biometrics could not be used to monitor exams. This resolution is the first that imposes a large fine, so it is assumed that universities will make changes if they do not want to go to the cashier’s office. Open door. The AEPD does not close the door to the use of biometrics as fraud prevention in the educational field, including AI systems. However, he points out that according to the European Union AI Regulationbiometric data is considered high risk, which does not prohibit its use, but does not give express permission to use it in this context. In Xataka | I’ll take the exam online for €20: the new student situation is an open bar for cheating Images | VIU, Pexels

A town in Burgos has resorted to a desperate idea to get people to stay there: paying them for food

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Cardeñajimeno is a small town from the Alfoz de Burgos region, in Castilla y León, where just under 1,200 residents live. Its city council is not willing to let that figure drop and has decided to tackle the challenge of depopulation by making it as easy as possible for its inhabitants, especially the elderly. As? Cooking for them and bringing food to their doorstep. Whatever it takes to escape from an “emptied Spain” that has been going on for decades. expanding your footprint through the peninsula, with the challenge what that entails. Objective: establish population. Spain may move in record population numbers, with 49.4 million of censuses as of October 1, 2025, but that does not mean that the entire territory is going through its best demographic moment. On the contrary. The ‘record Spain’ also hides a ‘Spain emptied’ that has spent decades spreading its footprint across the peninsula, feeding on municipalities that have been gradually depopulated. I warned him Before the pandemic, the Spanish Rural Development Network (REDR) recalled that in a matter of two decades the number of towns with less than one hundred neighbors had increased by 60%. A similar message The Galician Accounts Council was launched in 2024, remembering that a hundred towns in the region face the risk of becoming ghost towns. How to avoid it? That’s the million dollar question. In an attempt to fix the population and not swell the map of emptied Spain, over the last few years the administrations have racked their brains looking for solutions. Some offer financial aid to attract new residents. There are town councils that they are taking charge of local businesses (gas stations or grocery stores) to prevent their neighbors from being left without basic services. And not long ago we even told you about a remote town in the province of Soria that reached offer house and business in an attempt to attract new blood. Making it easy. In Cardeñajimeno (province of Burgos), they have gone one step further to make it as easy as possible for its inhabitants and prevent the elderly from packing their bags to move to larger towns. As? Taking care of your diet. The news has advanced it Burgos Connectwhich on Saturday revealed that two populations in the region “will pay for food” to their elders to stop the depopulation that is shaking part of the community. “Encourage permanence”. The towns in question are those that make up the municipality of Burgos: Cardeñajimeno and San Medel. A few days ago its Consistory launched a tender to look for professionals interested in providing a “catering service to elderly people” residing in the town. The goal? “Promote the elderly person’s permanence in their usual environment and avoid depopulation.” In other words, provide the necessary means so that no elderly person from Cardeñajimeno or San Medel is forced to move to Burgos or another larger town in search of comforts. But… Is it necessary? The case of Cardeñajimeno is interesting because it shows that rural Spain not only faces the challenge of depopulation, it also deals with aging. Although the situation of the town is far from being critical (the INE counts there 1,185 registeredbelow the 1,205 in 2022, but significantly above those recorded two decades ago), it does not escape the trend of the rest of Spain. 20% of its population is over 60 years old and dozens of octogenarians and nonagenarians reside in the town. “Nutritional well-being”. With the new service, the City Council wants to “provide nutritional and physical well-being to all those elderly who, given their special situation, require it.” To achieve this, it even contemplates that the company prepares “different diets” adapted to users with special needs. For example, diabetics or people who need crushed food. The base tender budget is 16,500 euros for one year, with a maximum price per menu of 9.6 euros, but the specifications also clarify that the final price will depend on the acceptance of the service, its users and how much food they request. On the State contracting platform the budget Estimated is 30,000. In other locations are already offered similar benefits. Image | Wikipedia In Xataka | Empty Spain is now officially one of the quietest places on the planet. There is no risk that it will cease to be

There are people so against sleeping that they have even made caffeine patches. It’s a bad idea

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If the 90s were the decade of nicotine patches to save the lungs and the 2000s that of transdermal contraceptives, 2026 has given birth to a different and more revealing obsession: wellness patchmania. If we thought we had seen it all in the universe of digital self-care —tapes to cover the mouth and sleep better, stickers to lose weight effortlessly or nighttime facial bandages that promise wake up with botox effect— the last frontier is here: patches to have energy, concentrate more or sleep better or reduce appetite. Simply peel off a small sticker, adhere it to your skin, and trust it to do its job. The so-called wellness patches or wellness patches are transdermal adhesives that promise to release active substances through the skin for several hours. As brands explain and advertising campaigns, allow you to avoid pills, bypass digestion and offer a slow and constant release of ingredients such as caffeine, berberine, B vitamins, melatonin, magnesium or plant extracts such as ashwagandha. According to The Guardianit is a market that is increasingly saturated with products that promise to treat “the most common symptoms of everyday life”: fatigue, stress, lack of sleep, menstrual discomfort or low mood. Many of these patches are sold in bright colors and designs designed not only to be worn, but to be seen. Well-being stops being something intimate and becomes a visible sign. The phenomenon is not new in medicine: nicotine patches, contraceptives or some hormonal treatments have been used for decades with proven effectiveness. The difference, As several experts point outis that these medical patches work because the molecules they release are suitable for passing through the skin and because they have passed rigorous clinical trials. In the world of wellness, that requirement disappears. An increasingly tired society The appeal of these products lies more in their aesthetics and comfort than in their effectiveness. In other words, there is no need to swallow a pill, prepare a drink or change routines: just stick something to your skin. As pointed out in The Atlanticpatches fit perfectly into a culture obsessed with constant self-optimization and hack vital. Furthermore, by being visible, they turn the user into a brand ambassador: they generate conversation, social validation and the feeling of doing something for their own health. However, the scientific consensus is quite clear. As Michelle Spear explainsProfessor of Anatomy at the University of Bristol, the skin is not designed to absorb substances, but to block them. Its outer layer, the stratum corneum, acts as a wall formed by dead cells and lipids that prevents the passage of most compounds. Only some very specific molecules can pass through it easily: small, fat-soluble and without an electrical charge. Nicotine or estradiol meet these conditions. Many of the substances present in wellness patches such as vitamin B12, minerals such as magnesium or iron, or plant compounds such as berberine are too large or water-soluble to pass through the skin in significant quantities. In other words, if a substance requires high oral doses or even injections to be effective, the probability that a sticker will be able to deliver it in a useful way is very low. Added to this is the lack of independent studies that show that these patches can correct real deficiencies or treat health problems. The problem of “feeling better” Immunologist John Tregoning suggests a key question: How do you measure whether something works when the effect is “feeling better”? Tiredness, stress or concentration are deeply subjective experiences, influenced by multiple variables. Sleeping more, changing routines, eating better or simply believing that something will work can alter perception. Beyond the lack of effectiveness, experts warn of possible side effects. From the British environment have collected cases of dizziness and feeling of weakness after using patches with berberine. Added to this are skin irritations, allergic reactions and a false sense of security that can delay seeking medical attention. When the patch is no longer harmless. Caffeine patches are promoted as a gentler alternative to coffee or energy drinks. However, testimonies collected in different media they mention nervousness, difficulty sleeping or feeling overstimulated. The problem is not just the caffeine, but the inability to control the dose: unlike a drink, the patch continues to release it for hours, even when the body no longer needs it. Berberine poses a different problem. These patches are marketed as appetite suppressants or metabolism accelerators, and have even been compared – without scientific basis – to drugs such as Ozempic. The experts remember that there is no solid evidence berberine can be absorbed effectively through the skin or cause significant weight loss. Furthermore, these products are becoming popular in a context of the return of aesthetic pressure and the obsession with thinness, especially among young women. The risk is not only physiological, but cultural: presenting hunger control as something that can be turned off with a sticker reinforces an instrumental and problematic relationship with the body. The patch as a cultural symptom The underlying question cuts across all sources: why do we look for such simple solutions? As Deborah Cohen points outwe are medicalizing normal life experiences. Sleeping poorly, being tired or losing concentration are not always pathologies; Many times they are logical responses to a demanding, hyperconnected and poorly rested environment. However, we live in a culture that prefers shortcuts to rethinking. It is easier to put on a patch than to review schedules, workloads, expectations or rest habits. These products do not promise to change life, but to make it more bearable without questioning it. They function, in that sense, more as a cultural pain reliever than as a health tool. Most experts agree thatif a patch makes someone feel better and does not cause harm, its occasional use is not necessarily dangerous. The problem arises when they are presented as real solutions to complex problems or when they replace basic habits such as sleeping, resting, eating well or consulting a health professional. Perhaps the success of caffeine and berberine … Read more

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