decades

Jaén was the largest producer of lead in the world. Decades later, he wants to repeat the game with rare earths, but he has a problem: reality

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Somewhere between Linares and La Carolina there is a rusty derrick: the iron skeleton of what was, at the end of the 19th century, the largest producer of lead in the world. It is, obviously, the past, but in recent years many are completely obsessed with it being also the future. We have the latest example of this about 80 kilometers north of that derrick. There, in Aldeaquemada, an Australian company has just extracted a drill core and to announce that it is “a high quality area”. The question that hovers over Jaén these months is not whether there are minerals under its feet. We all know that. The question is whether all this dance of prospecting that we are seeing is something real or is it simply the expression of the desire of a province that continues to associate its ‘golden age’ with mining. What is happening? The last episode, as I say, stars Osmond Resources. In the SOR-08 survey has cut more ore than expected north of the province. We are talking about a project that covers 756 mining units between Aldeaquemada and Santiesteban del Puerto and search “titanium, zirconium, hafnium and rare earths” trapped in quartzites that hundreds of millions of years ago were beach sand. The ad has a trick, yes. What they have announced is a confirmation ‘during’ drilling. Laboratory analyzes (those that count) will take weeks. But, in reality, that is not what interests us. It is enough to do a small search on the internet to confirm that Jaén entire is being drilled with passion and enthusiasm for months now. And where does all that enthusiasm come from? In principle, three relatively independent engines. The first is geopolitical: in 2024, the European Union pressed the accelerator on ‘mineral sovereignty’ and approved a regulation on critical raw materials. The idea was to ensure that the extraction, processing and recycling of strategic raw materials carried out in Europe cover respectively 10%, 40% and 25% of EU demand. A project like Orión, oriented towards rare earths, is typical of something that in Europe (and in Madrid) sounds like glory. The thing about Madridor it is rhetorical. Just a couple of months ago, the Government approved a raw materials plan of 414 million euros which includes the largest mining prospecting campaign in Spain in more than half a century. Sierra Morena is expressly cited in it. Sara Aagesen he came to say that “with all certainty” rare earths will appear in the country. And then there’s the bag… That is the third engine. Companies like Osmond Resources live off the deposits, yes; but above all they live off the news cycle. After all, its market capitalization depends more on the ‘media battle’ than on the final results. In a field as complex as mining, failure is almost a given. And why is it important? Because behind all this noise there are a lot of small, aging towns those who are sold a new future. The mayor of Aldeaquemada It didn’t take long to celebrate Osmond’s results as a way to “generate jobs and wealth.” But the reality is that the Most exploration projects never produce. The energy transition has served as an alibi to look underground again, but the sector has changed so much that for the vast majority of actors, expectations are beginning to be more useful than reality. And that, in Empty Spain, is an existential problem. Image | Shane Mclendon In Xataka | Where there was lead before, now there will be rare earths: Jaén revives its mining past for the energy transition

We’ve been looking for aliens the wrong way for decades. The solution could be in the dust of the Moon

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It is possible that we are looking for the wrong traces of extraterrestrial civilizations. According to a study published recently by Oxford astrophysicist Brian C. Lacki, the mistake has been in looking for active technological signatures. That is, signals derived from extraterrestrial technologies that have been emitted directly. These signals are lost over time. On the other hand, technological signatures that passively act on the light of a star are easier to detect. And the best thing is that, if you can’t find them, you could always search in the middle of the lunar regolith. This all sounds very crazy, but it actually makes sense. Active or passive signatures? That’s the question. Traditionally, search projects for extraterrestrial civilizations, like SETIhave focused on the detection of possible radio signals coming from their technologies. These are not signals emitted on purpose so that we can find them, but rather the result of their own technological activity. The problem, according to Lacki in his study, is that, if they have followed an evolution similar to ours, they may not be broadcasting on the radio for more than 100 years. We ourselves have been replacing emissions in this range with fiber optics or satellites with directed emissions and very little “noise” that can reach “intergalactic gossip.” What leads us to think that they continue century after century using the same technologies? They may continue to emit, but no longer in radio waves that disperse into space. The Oxford astrophysicist proposes changing this position by searching for passive technosignatures. That is, signatures derived from the interaction of smart technologies with starlight. three types. There are three types of passive technosignatures: obscuring, flashing and diffusing. The former act in a similar way to an exoplanet passing in front of its star. When a large object, such as an artificial satellite, passes in front of a star, it temporarily obscures it. This could be confused with an exoplanetbut the idea is to look for concealments with unconventional shapes, that do not resemble anything known. In the case of flashing signatures, they would be those produced by devices with mirrors aimed at concentrating the star’s light. As if they had their own solar plants. At some point, these types of mirrors could generate flares observable from Earth. Finally, the diffusion signatures would spread the light in all directions, so that a fainter change would be observed, in the form of a color modification in the light spectrum. What if they are no longer there? If it is already difficult to find other intelligent civilizations, it would be even more difficult to find one that is contemporary with ours. We may simply find technosignatures of a civilization that has already died. In that case, or even if the technologies have simply been abandoned for another reason, there would no longer be intelligent beings in charge of maintaining the devices, so their orbit would end up shifting and they could collide with each other. If this happens, it is possible that very small fragments will be generated, which this scientist calls technograins. They are so small that the star’s gravity is not able to attract them any more than the stellar winds push them away. Therefore, they would end up swept away from their neighborhood and become a cloud of dust that our solar system could eventually encounter on its journey through the galaxy. The Moon comes into play. If all of the above occurs, Lacki considers that it could be that some of that dust settles on the Moon, where there is no wind nor are there geological processes that alter the surface, so it could remain for a long time. Therefore, for him, one way to look for technosignatures would be to inspect the lunar regolithlooking for dust that appears to have a technological origin. That, perhaps, could lead us to some intelligent civilization that has gone unnoticed by us. In short, according to the curious perception of this scientist, when trips to the Moon become more common than anecdotal, we could have an easier time finding technosignatures. Of course, for this, fewer telescopes and more sieves. Images | Leo Visions (Unsplash) In Xataka | TRAPPIST-1 was the most promising solar system to search for life. Now our joy is in a well

The world has been searching for the formula against the housing crisis for decades. There are those who believe that the answer is in Vancouver

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When you think about the residential market, price escalation and affordability of housing, more and more cities are looking up. The idea is very simple: build taller buildings and make more use of limited land, especially in the most sought-after neighborhoods. That philosophy is catching on, for example in Basque Countrywhere new apartments are proposed on buildings that already exist, or in Madrid, which aspire too to expedite procedures. In Vancouver (Canada) they have decided to go one step further and create a kind of ‘XL laboratory’ to answer a key question: Would the residential crisis be alleviated if we reduced bureaucracy and were more flexible with buildability? An impossible market. Living in Vancouver is not easy. Not at least if you don’t have a generous salary and you aspire to stay in a (more or less) well-located and (more or less) comfortable home. a study disclosed by Frontier Center shows that the British Columbia city deals with one of the least affordable markets on the planet. Canadian families who want to purchase a property need, on average, to invest the equivalent of 10.8 full years of gross income. And that for a ‘normal’ cost house. Globally, it is only surpassed by Hong Kong, Sydney, San Jose and Adelaide. The situation in Vancouver is actually worse than in Los Angeles, San Francisco, New York or any other large conurbation in North America. The rental market does not offer much comfort either. According to Zillow Rentalsthe average income is close to 2,900 dollars and last year it was above 3,000. Against this backdrop, the authorities have set the goal of injecting into the market 83,000 new homes in the coming years. You will find more infographics at Statista And what is the reason? Beyond the imbalance between supply and demand or the arrival of immigrants with an investment mentality, a few days ago, in a column published in The New York TimesBinyamin Appelbaum mentioned another key factor: excessive bureaucratic rigidity and regulatory blockage, a problem that is not exclusive to Canada. “Cities have largely lost the power to approve projects. To prevent officials from acting against the public interest, we have taken away the power to act in its favor,” regrets Appelbaumveteran reporter The New York Times and specialist in economics and business. “We are so committed to justice that we have lost sight of the injustice of inaction.” “Restore affordability”. In his analysis, the expert recalls the construction limitations imposed in coastal cities like Vancouver in the 1960s, the effects of the 2008 financial crisis, the structural housing deficit (in 2023 it was estimated that Canada needed 3.5 million of extra homes by 2031 to “restore affordability”) and tension in the rental market. In the specific case of Vancouver, the geographical limitations of the city are added, constrained between mountains to the north, the ocean to the west and the border with the United States to the south. Also the characteristics of its urban planning, with a large weight of small properties. Houses, gardens… and skyrocketing prices. “The biggest problem is that Vancouver is a city of single-family homes. It has an imposing skyline in the center, but, if we see it from the air, the vast majority of the land is occupied by houses surrounded by grass,” comment Appelbaum. He is not the only one who highlights this peculiarity of the Canadian metropolis. In his chronicle he cites another expert, Alex Hemingway, senior economist at BC Policy Solutions, who questions this use of land in a city with residential m2 skyrocketing and rents through the roof. Appelbaum even cites specific cases in which apartment towers have given way to mansions, which further reduces the housing stock. A laboratory called Senakw. Despite this context, for a few years Vancouver has hosted a special project: in the heart of the city, near English Baythere is a wide strip of land 10.48 acres (just over four hectares) in which large apartment towers are being built. What’s more, the objective is to build one of the residential neighborhoods there with greater density from all over Canada: around 6,000 homes spread across 11 towers. His name is Sen̓áḵw and it is much more than theory or a plan drawn up on paper. The first building of the initial phase (which will encompass 1,049 homes spread over three towers of 27, 32 and 40 floors) is almost ready and the idea was for its first tenants to move in at the end of May. The Realist precise that the promoters want to finish the second block in the summer and the third before 2027. How is it possible? Very easy. Because Senakw is not just another real estate development. In fact (and this is the key) the 4.4 hectares it covers enjoy a special status that free it from the regulatory straitjacket that limits construction in other neighborhoods in Canada. The reason: that land does not depend on the Vancouver authorities, but on the Squamishan indigenous people who occupied the land long before the first Western settlers arrived. The land, located on the south bank of False Creek, was home to one of the 23 ancestral populations of Sḵwx̱wú7mesh Stélmexw, but in 1913 the natives residing there were evicted “by force”. Although the British initially recognized the area as a native reserve, the value of the land led the provincial government to pressure their families to leave in the early 20th century. Their offer was very simple: either accept the payments offered or risk be left with nothing. Then the Government burned their homes. That episode gave rise to a decades-long lawsuit that ended in 2003when justice returned 4.4 hectares to the Squamish Nation. “More than buildings”. A decade and a half after that historic ruling, in 2019, the Squamish Nation voted in favor of developing a residential project on the land and thus creating “a legacy” for the next generations of natives. The result is Senakw, an ambitious project of 6,000 homes spread … Read more

For decades, companies have accumulated capital and talent. Satya Nadella Thinks They Need Something Else Now: Token Capital

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The reflections of the CEOs of large companies must always be taken with some caution since they are not usually simple reflections thrown into the air. They seek to give someone their ear: investors, rivals, users or to calm the waters among its employees. Satya Nadella, has published in their profiles of social networks a text in which he redefined, without much dissimulation, what a company should be in the era of artificial intelligence. It was not just a statement, but rather it almost pointed to become a manifesto in which the focus of the race was changed by develop the best AI model (an area where Microsoft seems to accept the Copilot’s defeat) and defines that the future of companies involves generating a third pillar to their structure: token capital. The company of the future needs a new type of capital: token capital. Nadella does not conceive AI as a substitute for human employees since, according to his thesis, human capital is the basis for turning AI into a truly disruptive tool that is nourished by knowledgethe criteria, the relationships and the reading of patterns that employees provide. However, it brings a new element to the business equation: token capital. This new element is formed by the AI ​​that a company builds and owns, not in the models that third companies rent to it. Currently, most companies use AI as a subscription service in which they pay for a model that they use to perform tasks with it. However, when they stop paying for it, all that knowledge and evolution is lost and the company retains nothing of all the knowledge. time and resources you have invested in fine-tuning its use. Nadella maintains that this path leads to transferring value to a few suppliers and the only ones who accumulate advantage are those who sell the models, the knowledge of each company ends up being the raw material that feeds others. The loop that becomes active. The Microsoft CEO’s idea revolves around what he calls a “learning loop”: a system that feeds back with each decision made and each workflow completed. That is, it is a knowledge base that makes the company’s memory permanent and not lost when changing the AI ​​model or employees. “This cycle becomes the company’s new intellectual property,” highlights the Microsoft CEO. “I look at it as a hill-climbing machine.” The key is that this asset, unlike what happens today, is evolutionary and is built based on training with real company data and internal measurements of its response. The more you use it and tune it, the more value it has. And, Nadella argues, the company that builds it will soon have something that can’t be bought in any AI model marketplace: a tool that has been “trained” to do a very specific job in a custom context. AI as a tool, not a monopoly. There is a paragraph in Nadella’s statement that is striking coming from the CEO of a company valued at three trillion dollars. Nadella compares the current risk with what happened in the first phase of globalization: entire industrial sectors were emptied by outsourcing. The macroeconomic figures of the countries they endured the loss of industrial fabric, but the social fabric ended up suffering by adding tension in the labor market. His warning leaves no room for interpretation: “If all value is concentrated in a few models, political economy simply will not tolerate it. There is no social permission for an AI future that destroys entire industries.” The goal, he says, has to be an ecosystem where each company can build its own learning, not be another cog in an AI monopoly. Actually, this is not new, since it is the same principle with which Microsoft built its platform business in Azure cloudwhich used Microsoft’s infrastructure for companies to generate more value than the platform itself had. The problem that the manifesto does not solve. However, Nadella’s words also raise a series of contradictions with respect to the latest movements of Microsoft and other large technology companies. The CEO maintains that human capital becomes essential as token capital grows since it is the employees who make a company’s AI learn. However, his own company has been half doing the opposite. Microsoft fired to more than 15,000 employees during 2025, and in April 2026 it offered voluntary retirement packages to some 8,750 workers in the US, something it had not done in its 51-year history, linking these layoffs to your commitment to AI. It is not an exclusive case of Microsoft. In the first quarter of 2026 they are already more than 92,000 layoffs among the employees of large technology companies and the argument that all companies repeat is the same: AI allows us to do more with less people. In Xataka | Jensen Huang enters the Samsung salary controversy: “Workers should earn as much as possible”

For decades we climbed this New York skyscraper without knowing that the screws that held it in place could not hold.

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The situation was more or less like this. For two decades, hundreds of thousands of people entered and left the doors of one of the largest skyscraper in New York City. These people, many of them workers, went up and down in the elevator completely unaware of the critical failure that the building had, terrifying in architectural terms, and that no one took into account. Rarely in the history of urban planning in large cities has there been a similar situation. The story dates back to the beginning of the 20th centurywhen the Lutheran church of Saint Peter was located on land of 53rd Streetbetween Lexington Avenue and Third Avenue, in Midtown Manhattan. By 1960, the church community was experiencing serious financial problems, which led the city council to sell the land. The negotiations were not easy and lasted years. Mainly, because the church demanded the creation of a new building separate from the apartment block in which it could continue its activities. In the end the project was given the green light. The developer accepted the conditions, and Citi Bank commissioned Hugh Stubbins & Associates to design the skyscraper. William LeMessurier was in charge of engineering. The final project consisted of a skyscraper, a church, a public space below street level and landscaping. The most important element was, of course, the skyscraper. The plan marked 46 floors that were to be distinguished from the rest of the city by the polished and anodized aluminum of the façade. In addition, between the panels there were rows of windows. It didn’t really look complicated, at least not like the roof and base of the building. The happy roof Thus, in 1977 the skyscraper was completed. By then it had grown larger, with 59 floors and a total height of 279 meters. An architectural work that dazzled at first glance on the city skyline, a colossal tower where its 45-degree inclined top stood out. The top of the roof resembles an isosceles triangle. The original plan was to build terraces and apartments, but over time the architects decided to install huge solar panels. LeMessurier, a professor and graduate of the Massachusetts Institute of Technology, carried out a series of tests to verify their efficiency. It turned out that the energy converted by the installation was insufficient. Eventually, the idea of ​​a small solar plant was abandoned. However, nothing like the base on which the building stood. Some “stilts,” as LeMessurier himself described, among which the then seventh largest skyscraper on the planet seemed to float. We are referring, of course, to those four gigantic pillars (34 meters each) that are located in the center of each side (rather than in the corners) of the base. It also had a single column in the center, in this case narrower, which housed the building’s elevator banks and provided additional strength to the frames. This design made room for the church under the northwest corner of the building, and gave the giant structure a brutal effectalmost as if he were levitating. In fact, it was exceptionally “light”, of only 25,000 tons (for reference, the Empire State Building was 60,000). The famous pillars The base became an architectural icon, as it made the space in the corners empty. LeMessurier had the weight of the skyscraper distributed to the exterior skeleton. Specifically, in a grid of triangular-shaped frames hidden under the façade. Interestingly, this structure was visible from the inside. The elements were not completely welded, but only fixed with bolted joints. Apparently, the steel frame designed in this way was intended to withstand perpendicular winds. According to the engineers, other types of wind should not pose a threat. Furthermore, municipal regulations did not require other air gusts to be taken into account in the design. The truth is that the architecture hid an important mechanism on the upper floors. The Citigroup Center had one of the first tuned mass dampers (TDM). It is a 360-ton concrete sphere embedded in oil. When vibrations from the ground or wind moved the building, the mechanism would oscillate in the opposite direction to the tilt of the building. The problems begin This swing was in turn balanced by hydraulic arms that support the sphere. With this solution, the skyscraper was able to “maintain balance.” As LeMessurier explained at the time, this piece was key, since its function was to cut the sway of the building in half by converting the kinetic energy of sway into friction. Once completed, the building was praised, but also the first doubts arrived. New York is not a major hurricane state, but it does have them from time to time. What would happen if, once every 50 years, the winds blew over 100 km/h? These winds can blow from different directions. The Citigroup Center opened in 1977 under the name Citicorp Center (which changed to Citigroup Center in 1998 following the merger of Citicorp and Travelers Group). But only a year after its inauguration it became clear that it could have a very serious defect structural. A year later, LeMessurier receives the call that no architect expects in life. It was Diane Hartleyan architecture student at the prestigious Princeton University who had studied the construction of the skyscraper for her thesis. The first of the calls was to ask him several technical questions about the design. Hartley’s professor had expressed doubts to him regarding the strength of a tilted skyscraper where the supporting columns were not at the corners. Hartley did some calculations of the building’s wind load. He then compared them with LeMessurier’s calculations and discovered that the construction engineers’ figures were incorrect. The student asked to be sent exact load calculations for different types of wind. Only received data related to perpendicular winds and guarantees on the solidity of the structure. What’s more, LeMessurier told him that the professor had no idea and that everything was in order. The geometry of the building’s frame worked perfectly with the pillars in such positions, … Read more

Triton has been looking like a strange moon for decades and the worst thing is that it seems to be entirely to blame

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Neptune It’s a strange planetboth for himself and for his environment. For starters, it’s tilted in a somewhat strange way. Its axis is 28º. It is not outrageous if we compare it with the 23º of the Earth. However, it is quite puzzling, because according to traditional planetary formation models, it should be much closer to zero. On the other hand, most of Neptune’s moons are very different from those of the rest of the gas giants. He only has one that could fit the predictions. But what about the rest? These questions have long intrigued astronomers. Now, thanks to two recently published studies, there are hypotheses for each of these phenomena. The curious thing is that both point to Triton’s guilt. A violent irruption. According to models recently made for the publication of two studies differentNeptune’s anomalies could have been due to the irruption of Triton into its satellite system. Possibly, during the dawn of Neptune, there would be several Moons rotating around it, all in the same direction. However, a passing Kuiper Belt object came close enough to be gravitationally attracted to Neptune. It was traveling in the opposite direction, so it violently burst into the window system, like a car bursting onto the highway in the wrong direction. Many moons shot out of the Neptune orbit. Others ended up directly destroyed. Only one, Nereid, stayed there, but with a much longer orbit. As for Neptune, its axis suffered that new inclination that does not fit with that of models of a calm planetary youth. Clues that didn’t add up. Neptune has 16 moons around it. The rarest is Tritonbecause it rotates in the opposite direction to that of Neptune and, due to its composition, it looks more like an object in the Kuiper belt than the Moon of a gas giant. Then we have Nereid, which is in an abnormally elliptical orbit, in which it takes 360 days to orbit the planet. The rest are much more homogeneous satellites, but too small and not very massive for what would be expected from the moons of a gas giant. Nereid, having such a rare orbit, has long attracted the attention of astronomers. When it was recently analyzed more closely with the help of the James Webb Space Telescope, it was found to be more similar in composition to the icy moons of other gas giants, such as Saturn or Uranus, than to a Kuiper Belt object. With all this in mind, it was decided to carry out a series of computer simulations, thanks to which we already have an answer. The most likely story. In 20% of the simulations, the result was a case unleashed by Triton. When it was attracted by Neptune, it destroyed the satellite system initial of this planet, as we have seen previously. Nereid held on without destroying itself or flying out of orbit. However, its orbit was deformed, giving rise to the strange orbit it has today. As for the rest of the moons, many of them became debris that regrouped under the effect of gravity, giving rise to the rings of Neptune. Furthermore, some of those fragments became the small moons that orbit the planet today. Triton, the cause of chaos, remained in a fairly stable orbit, becoming just another moon. Of course, a moon that rotates against the current, as a clue to the cosmic chaos that it unleashed at the time. A probe is needed to confirm. All this makes a lot of sense, but it is still a hypothesis with a not too high percentage of success in the simulations. The authors of the study insist that it will be necessary to send a probe to study Neptune closely and clarify the answers. Still, it is possible that Nereid is the only moon capable of truly telling us about Neptune’s past. It is a rare moon, but because it has endured a lot to be able to remain there. Image|NASA, ESA, CSA, STScI, Joseph DePasquale (STScI), Naomi Rowe-Gurney (NASA-GSFC) In Xataka | We have been deceived by the distances of the Solar System: the closest neighbor to Neptune is Mercury

We have been thinking for decades that plastic recycling was worth something. Maybe we were wrong

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That the plastic recycling system is broken is an open secret. But it is only little by little that we are realizing the dimension of the problem. The American association Center for Climate Integrity (CCI) published the year 2024 a report on plastic recycling. In it, they attacked the plastics industry, which they accused of having promoted the recycling of these materials even while knowing of the poor technical and economic feasibility. A difficult task. Recycling plastics is not an easy task. In our daily lives we use a wide variety of materials of this type, each one with certain functional and chemical characteristics. They all end up in the same container, the packaging, but from there it is necessary to separate each type of plastic to proceed to recycling when possible. It is not always possible. Disparate data. According to Ecoembes data, in 2024, 589,885 tons of plastic packaging were recycled in Spain, although NGOs such as Greenpeace cast doubt. According to GreenpeaceIn other years, the difference between the plastic recycling rate declared by Ecoembes (89.2%) and that estimated by the NGO itself (34.8%) is notable. It should be noted that it is still higher than the world average of 9% estimated by the OECD. According to the reportfigures like these are just a reflection of an impossibility: effectively recycling plastics is out of our reach. Not only from an economic perspective but also from a technological point of view. Single use. However, the report emphasizes an accusation: even knowing this impossibility, the industry promoted the idea that recycling was possible and viable to pave the way for single-use plastics like the ones we use in packaging. “They knew that if they focused on single-use (plastics) people would buy and buy,” explained to Guardian Davis Allen, CCI researcher and co-author of the report. Another point of view. The reaction of the industry did not take long to arrive. The American Chemistry Council, in a statementnoted that “American plastic manufacturers are investing billions of dollars in better, innovative products and technologies that separate, capture and recycle larger quantities and more types of plastics.” They allege that the “erroneous report” made reference to obsolete technologies and that it represents a misleading characterization of the industry and the present capacities for recycling plastics. “As is typical, instead of working together toward real solutions to plastic waste, groups like CCI choose political attacks over constructive solutions,” protested Matt Seaholm, president and CEO of the Plastics Industry Association, in a statement also collected by Guardian. Be that as it may, California took legal action in the matter. Will we make it? We may never achieve an efficient system of recycling that we can apply to the plastics of our daily life. In fact, the UN Global Plastics Treaty has failed again and again. But perhaps one day we will be able to treat this waste so that its waste does not contaminate our environment. One of the big bets In this sense, it is the discovery of enzymes capable of decomposing plastic polymers, breaking these chains to convert them into harmless molecules. It is undoubtedly a great promise that is getting closer and closer, but it is still far from being able to solve the problem. Although time is not what is left over. Pollution caused by microplastics is already a reality. These wastes have appeared in the most remote places on Earth, a sign of the great reach of these contaminants. Furthermore, we know very little about the potential impacts on health and the environment of this waste. In Xataka | I’ve always been curious about what they did with the yellow containers: so I followed one In Xataka | “In 200 years, archaeologists will search through our trash and find a terrible image of ourselves”: the dirty reality of what we throw away Image | Krizjohn Rosales *An earlier version of this article was published in February 2025

We have been mapping Antarctica for decades. We have just discovered that its largest basins form a single tectonic “fan”

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For decades, researchers have mapped the frozen continent, finding huge depressions and subglacial lakes that have left us in awe. Until now, these formations were studied as isolated pieces of a geological puzzle; However, a new study has turned this view on its head. The demonstration. This study has been published in Nature Geoscience and has just demonstrated that the great basins of East Antarctica are not independent accidents, but form part of a single, gigantic fan-shaped tectonic province. The tectonic fan. The research team, using a combination of subglacial topography, gravity and magnetism data, proposes that this entire vast region is the result of a distributed rotational extension process. To understand it, we can imagine the Earth’s crust in this area opening and stretching asymmetrically, unfolding as if it were a fan. This colossal tectonic movement makes East Antarctica one of the largest known examples of rotational extension in continental crust on the entire planet. The beginning. The origin of this continental scar is closely linked to the history of our planet, specifically to the tectonic phases linked to the fragmentation of the supercontinent Gondwana and the dramatic separation between Antarctica and Australia. As the land masses separated, the crust stretched and fractured, leaving this “bounced topography” that today lies hidden under miles of ice. Its importance. Beyond the undoubted geological and historical value, understanding this structure has a practical and urgent application, since Antarctica is the great thermostat of the Earth and its stability is key in the face of climate change. The topography beneath the Antarctic ice sheet acts as a mold that conditions absolutely everything that happens on the surface. This is seen, for example, in how the shape of bedrock controls the flow of today’s glaciers and determines how subglacial lake and basin systems are distributed. That is why, if we want to predict with mathematical precision how the Antarctic ice will respond to global warming and how it will flow towards the ocean, we need to know the tectonic “pipe” on which it rests to the millimeter. Its mystery. Although the article Nature Geoscience manages to unify structures as massive as the Wilkes and Aurora basins under the same theoretical framework, the authors maintain scientific caution. The exact age at which this fan province formed and the fine geodynamic mechanism that triggered it remain, to a large extent, open questions, and this means that work still needs to be done to find out exactly when the movements of the Antarctic crust will occur. Images | Tam Minton Nature In Xataka | Antarctica was practically the last corner of the Earth immune to touristification. That’s ending

Microsoft believed it would take decades to have a useful quantum computer. Majorana 2 just pushed that deadline to 2029

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Finding the Majorana particle would be the best thing that could happen to them. quantum computers. The Italian physicist Ettore Majorana mathematically described its existence in 1937, and since then many researchers have become obsessed with it because it has a characteristic that makes it unique: it is both a particle and its own antiparticle. What makes it very attractive for quantum computing is that, when it appears, it does so in pairs and its topological nature gives it a resistance to external noise that conventional qubits do not have. This distribution of information at two separate points means that local errors triggered by vibrations, temperature or radiation cannot easily erase it. The coincidence of this duplicity and its stability suggests that these particles could be used to make qubits that are more stable and less prone to external perturbations than the qubits used in current quantum computers. Or that, at least, is what Microsoft is pursuing, although with an important nuance: it sounds very good, but after the cold water of 2021 physicists are extraordinarily careful when dealing with them. Microsoft promises to have a functional quantum computer in 2029 Microsoft does not work with Majorana fermions in the strict sense of the elementary particle predicted by Ettore Majorana. What you are looking for are Majorana modes or Majorana quasiparticles: collective excitations that emerge in certain topological superconducting materials and that behave as if they were Majorana fermions. They are not fundamental particles; They are emerging phenomena in the field of condensed matter. This strategy allowed Microsoft officially present in February 2025 Majorana 1, the first topological quantum processor. However, the scientific community received it with skepticism. And it did so because the Redmond company claimed to have created a state of matter in silicon that until then it only existed in theory. His proposal was to use Majorana modes as a basis for more stable quantum computing. Majorana 2 has been developed with the help of Discovery artificial intelligence The problem is that Microsoft had tried to demonstrate something similar before, in 2018, and the scientific article that supported it ended up being retracted by Nature three years later. Majorana 1 was, in that sense, both a technical advance and an attempt to regain credibility. And now Majorana 2 arrives. Microsoft has confirmed that this new quantum processor has been developed with the help of its artificial intelligence (IA) Discovery, and has also explained that it incorporates new materials with the purpose of accelerating the arrival of an error-resistant, and therefore fully functional, quantum computer. Chetan Nayak, CTO and Corporate Vice President of Quantum Hardware, has explained that the Microsoft Quantum team has improved the materials stack used in Majorana 1 for the purpose of create a more stable topological phase. Majorana 2 replaces aluminum with lead, and upgrades the semiconducting active region to a combination of indium arsenide and indium arsenide-antimonide. This change in materials has triggered, according to Microsoftsignificant performance improvements. And it also helps protect the fragile qubits of cosmic disturbances that can destabilize them. Be that as it may, this statement from Nayak summarizes the impact that Microsoft believes Majorana 2 will have on its roadmap: “Based on this rapid progress, we are accelerating our plan toward a scalable and practical quantum computer: we have cut our schedule in half and now aim to reach this goal in 2029.” It is an ambitious promise. And with Microsoft’s track record in quantum computing, the scientific community has reason to continue to be demanding when evaluating it. Image | Microsoft More information | Microsoft In Xataka | 38% of AI experts in the US have been trained in China. They are essential to sustain your leadership

Antimatter has a property that has taken physicists decades to measure. CERN just did it a hundred times better than anyone else

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Antimatter is fascinating not only because of its essence; It is also due to the still enigmatic role he played in the origin of the universe. Scientists still do not have the necessary tools to understand with any precision the role of this form of matter in the formation of the cosmos and the mechanisms that govern the tenuous line that delimits the imbalance between matter and antimatter. Fortunately, what they do know are its constituent elements and some of its properties. Understand what is antimatter It’s not difficult. And we can observe it as an exotic type of matter that is made up of antiparticles, which are particles with the same mass and spin as the particles we are familiar with, but with the opposite electrical charge. In this way the antiparticle of the electron is the positron or antielectron. And the antiparticle of the proton is the antiproton. Antimatter has a surprising property: when it comes into direct contact with matter, both annihilate, releasing a large amount of energy in the form of high-energy photons, as well as other possible particle-antiparticle pairs. It is currently being studied in many of the most important research centers specialized in particle physics in the world with the hope that knowing it better will help us understand some of the mysteries of the cosmos that remain out of our reach. The hyperfine cleavage of antihydrogen has been revealed CERN’s antimatter factory produces this form of matter by firing high-energy protons from an adjacent synchrotron at a metal block. This process generates a cascade of secondary particles, and among them antiprotons arise. These latter particles can then be cooled to be used in the facility’s experiments. ALPHA (Antihydrogen Laser Physics Apparatus or antihydrogen laser physics apparatus), which is one of them, is specialized in producing antihydrogen by fusing antiprotons with positrons. Researchers then use magnetic fields to trap the antihydrogen for further study. An antihydrogen atom is composed of an antiproton in its nucleus and a positron orbiting around it, in the same way that a hydrogen atom contains a proton around which an electron orbits. Deuterium and tritium, the two isotopes of hydrogen, also have one or two neutrons in the nucleus respectively. The researchers of the ALPHA experiment have achieved something amazing: have measured hyperfine division of the ground state of the antihydrogen atom with a precision of 4 parts per million, improving the previous result by two orders of magnitude. This milestone is very important because it allows very rigorous tests to be carried out in the field of quantum electrodynamics. Hyperfine splitting of the ground state of the antihydrogen atom is the small splitting of the lowest energy state of the atom due to the magnetic interaction between the antiproton and the positron. According to the fundamental symmetries of nature, this measurement should be identical to the equivalent effect observed in hydrogen. Be that as it may, this milestone is very important because it allows very rigorous tests to be carried out in the field of quantum electrodynamics, which is the most precise theory that explains the interactions that occur between charged particles and light. Jeffrey Hangst, the spokesperson for the ALPHA experiment, explains that “the hyperfine splitting of the ground state of hydrogen is the origin of the so-called 21 centimeter lineso prized by radio astronomers and researchers searching for extraterrestrial intelligence (…) When the antimatter factory was conceived in the 1990s, the hyperfine splitting of antihydrogen was one of the key measurement objectives justifying the construction of the facility.” “The current measurement represents the culmination of many years of effort,” Hangst pointed out. “We have pursued the precise determination of the hyperfine splitting of antihydrogen since we demonstrated how to trap antimatter atoms in 2010. And now another group in the antimatter factory, the ASACUSA collaboration, is also trying to study this very important transition. Their technique, if demonstrated, has the potential to achieve even greater precision.” Thanks to ALPHA’s high level of precision, the measurement of hyperfine cleavage is sensitive to the effects of the internal structure of the antiproton at the center of the antihydrogen atom. In any case, this result is a very important step in the effort to further explore the nature of antimatter. Image | CERN More information | CERN In Xataka | European science gets serious: EUROfusion and CERN will work together on nuclear fusion and new colliders

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