created

The US promised them very happy resurrecting its nuclear industry. Now a problem with tariffs has been created

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The commercial war that He has started United States this April has given much to talk about, especially for Tariff dispute with China. This situation has put an old energy problem on the table: the dependence of foreign uranium. An uncomfortable dependence. The policies of the current American administration They have made clear their position not to continue towards the change of the energy transition. The Trump approach is placed in fossil fuels, but in nuclear matters it was preceded by Biden. In this specific case the energy constant is has maintained Between both governments, which in the road map left that nuclear energy should triple. In this way, the United States has been importing 99% of Uranium concentrate to make fuel for your reactors. In addition, the 54 nuclear centrals of the country generate about a fifth of all the electricity it consumes, According to Ciphernews. Who are the suppliers? As detailed in the same medium, most of the uranium has come from Canada, Kazakhstan, Australia, Russia and Uzbekistan, and although this mineral It was exempt of tariffs, the situation can vary Seeing the stage. In short, the issue has generated a stir in the energy sector and has exposed a structural vulnerability in its nuclear supply chain. A bet towards national mining. According to the United States Energy Information Administration (EIA)last year the national production of uranium concentrate multiplied by thirteen, but still is not enough to meet the demand. However, Scott Melbye, president of Uranium producers of America, He has assured that at least six companies have restarted mining operations in the country. It was not always like that. USA It was the largest uranium producer of the world in 1980, but in the following decades other countries ate the land, as was Canada and Kazakhstan because the extraction costs were lower. The situation worsened with a nuclear disarmament agreement of the USSR and for 20 years the half of the US nuclear fuel came from the recycling of Soviet uranium. After all this situation, in which it began more and more to depend on the uranium of others came the Fukushima accident in 2011. After this tragedy many countries, including USA, They reduced their investment in nuclear energy. Western mining companies paused operations, while Kazakhstan, with state support, Increased its production without worrying about profitability. Russia also continued to sell cheap uranium, even after the end of the disarmament agreement in 2013. Will it be self -sufficient? The orientation of Trump’s policies It seems to point towards the reactivation of its internal nuclear supply chain. Although uranium is still free of tariffs, global tension, technological advances and energy urgency are pushing the country again to look at their own subsoil. The big question is whether this rebirth will be sufficient and sustainable in the long term. Image | Pxhere and Gage Skidmore in Flickr Xataka | The uranium is listed up after the nuclear resurgence. And a company wants to start extracting it in Greenland

I have no idea how an app is programmed. I just created one in 20 seconds with Google Firebase

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I have tried Learn to program a few times. Each and every one of them I have finished leaving it. Beyond the most basic foundations, I have no idea how to start building an app. My partner Iván Linares, from Xataka Android, has managed to create an application with the new tool from Google, Firebase. And, according to your experience, it is something that is achieved in five minutes. So I wanted to test This tool To check if, the King of Dummies in programming, I could create my own applications in a matter of minutes. It would be an achievement. Google Firebase. Google Firebase It is a cloud platform for the development of applications. It is not a new service, but now it has a new ally that allows you to even create an app: Gemini. Thanks to the implementation of its artificial intelligence, one of the most powerful and covered of the moment, it is possible to create applications in Google Firebase. Best of all, we do not need to have a code idea. We just have to go to Firebase Studio. Point that the process is completely free, and that we have up to three work spaces available. More than enough to to play beautifully with the tool. Gemini’s integration is still in the test phase, so we are warned that there may be errors. Testing Google Firebase: Open Firebase is to open an interface that leaves no margin of error. We have a box to write the prompt, in which some ideas already preferred appear. I have not wanted to complicate or the least: “A CALCULATOR APP”. Gemini has not taken five seconds to generate the keys of “Calcify”. It does suggest the name, and you can change it if you don’t like it. In the summary that has offered me, the following data appeared, information about the app that we are going to create. The UI (the interface). Mathematical Operations Algorithm Dynamic screen to show the results Errors calculation Color palette Wow. In case I did not convince me some part of this return on how to make the app, you only have to describe the changes. Now just play “Prototype This App” and expect magic to happen. It is impressive to see how, in real time, everything is created. I have been especially attracted to checking how errors automatically self -correction, something that takes more than a few seconds. It has not taken a minute, in just 20 seconds the app. Yes, it is nothing more than a calculator app. But it has created it an AI with a prompt of a line in less than 20 seconds. It is quite impressive. So far we have our app, but I don’t hide if I confess that I have released a “jo*er” just after. I wanted to try how long it takes to make changes. With a simple prompt. I want the color of the “ac, c, and +/-” keys to be network, so there’s more distinction. I also want it to have the name “Calcify” Written in the Top Left Corner. He has got to work, changing the necessary aspects to make the modification that I have told him and … It has not taken five seconds to return the app with the relevant modifications. Firefly’s main limitation is in the publication, although it helps us a lot. We cannot directly ask you to generate the APK, and we will have to help ourselves more or technical knowledge to import the necessary files in Android Studio and end up generating the app file to use it outside Firebase. However, it is an impressive tool as much as entertainment and to take our first programming steps. Combined with Chatgpt or Deepseek it has enormous potential. Image | Xataka In Xataka | Jensen Huang is clear: At this point no one should learn to program, AI will do it for us

In 1643, Descartes created one of the most important theorems of geometry. We knew he was right, but we didn’t know why. Until now

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In 1643, René Descartes wrote a letter to Princess Isabel del Palatinado in which she simplified a classic problem of Western geometry and offered a solution: the so -called ‘Descartes theorem’; that, according to the famous problem that Frederick Soddy published in 1936 in Natureit can be summarized as “the sum of the squares of the four curvatures is half the square of its sum in figures.” Basically, he found a relationship between the radios of four mutually tangent circles. The problem is that the French philosopher did not explain the reasoning behind that relationship and, in fact, he never managed to find a general formula for more than four circles. His intuition is that this solution existed, but was not able to find it. That has brought mathematicians since then. A couple of years ago Daniel Mathews and Orion Zymaris, from the Australian University of Monash, They decided to try With a radically new approach. What if we use tools of theoretical physics? That was the question that was asked: As Héctor Farrés explainedinstead of pulling the tools of conventional geometry, they began to play with ‘thorn’ (a type of objects of theoretical physics that need a 720 degree turn to return to their natural position). “We use a version of thorn developed by Roger Penrose and Wolfgang Rindler, which applied to the theory of relativity,” The authors said. In this way they achieved ‘re-conceptualize’ circles as algebraic entities that can suffer from geometric transformations. That was the key to obtaining a general formula to be able to describe increasingly complex groups of mutually tangent circles. Why is it interesting? To start because it solves a historical problem of geometry. But, above all, because it does it again and with many ramifications. When Andrew Wiles He managed to demonstrate Fermat’s last theoremthere was some disappointment for the use of modern mathematical tools. In that case it was understandable: part of the grace of the problem was to find the demonstration that Fermat himself said he had discovered (but never wrote). With Descartes’s theorem is different. There was nothing to look for, just a solution to develop. And doing so shows all the potential of mathematics to destroy the limitations that lead us to grip for centuries. In the end, As Arthur C. Clarke said“When a distinguished but elderly scientist says that something is possible, it is almost certain that he is right. When he states that something is impossible, it is almost certain that he is wrong. Image | Frans Hals | Jacob Rus In Xataka | The “Matrix” fillet was always real: philosophical and metaphysical reflections on metovers

We do not know what the Benchmarks of Ia measure. So we have talked to the Spanish who created one of the most difficult

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Gemini 2.5 Pro is the best model in history. The smartest. At least, right now. I don’t say it, he says The Chatbot Arena classificationa platform in which they run various tests or benchmarks to try to measure the global capacity of modern AI models. According to these evidence, at this time Gemini 2.5 pro experimental, launched On March 25, it has a score of 1,440 points, well above GPT-4O (1,406), Grok 3 (1,404), GPT-4.5 (1,398) and of course an Depseek R1 that despite its fame is in seventh place with a score of 1,359 points. In current Ranking of Chatbot Arena, it places Gemini Pro 2.5 experimental as the most capable model of AI at the moment. That (probably) does not last long. Google herself presumed the capacity of Gemini 2.5 Pro experimental in the official announcement. As usually happens in these ads, companies show a table in which they compare their performance with that of other comparable models in different tests. In almost all of them Google crushed their rivals in well -known tests in this segment. Is for example the Humanity’s last exam (general knowledge and reasoning), GPQA Diamond (science), Aime 2025 (math), Livecodebench V5 and Swe-Bench Verified (programming) or Mmmu (visual reasoning). All these benchmarks try to measure the ability of these models in more or less specific fields, and all help to demonstrate that models, indeed, are improving. And yet none of them answer the fundamental question: Is the AI so intelligent Like the human being? There is the really complicated, because the definition of intelligence is not entirely clear either. There are different types of intelligence, in fact, and measuring them in humans is not simple or even possible either. And comparing the ability of an AI with the ability of human intelligence is usually not easy. Some experts wonder if IA laboratories will not be cheating with the benchmarks There are in fact who argues that the progress of AI models is misleading. It recently Dean Valentine, from the Startup Zeroopath. He and his team created an AI system that analyzes large code projects in search of security problems. With Claude 3.5 Sonnet They noticed a great leap, but from there the subsequent versions have seemed much less striking. In fact, this expert pointed out that today many of the companies that launch these models focus too much on going well on the photo of the existing and most popular benchmarks and “sound intelligent” in conversations with human beings. Wonders if the laboratories of AIs are cheating and lying: For him the evolution shown by Benchmarks does not correspond to the real benefits when using them. Frontiermath and the challenge of solving problems that (almost) nobody has solved But there are attempts to answer that question. One of them comes from the team that develops THE ARC-AGI 2 PROJECTa set of evidence derived from the Moravec paradox: They are relatively easy for human being, but very difficult for AI models. Jaime Sevilla, CEO of Epoch Ai. These tests measure the ability to generalize and abstract reasoning with visual puzzles, and are undoubtedly an interesting part of that effort to value how far we have arrived at every moment with the AI ​​models. Another of the most striking tests of recent times is Frontiermath. This benchmark created by the company COPHAI It consists of about 300 mathematical problems of different level. They have been designed by a team of more than 60 mathematicians among which Terence Tao, winner of the Fields Medal. Although there are some more affordable problems, 25% of them are qualified as especially complex. In fact, only the best experts could solve them, and It would take even days In doing so. This set of tests is also special for another aspect: these are unpublished problems and therefore have not been part of the training sets of any AI model. To solve them the machines need to be able to show a special “mathematical intelligence.” One that It helps precisely to something increasingly difficult: Assess the evolution of these models. In Xataka we have been able to talk to Jaime Sevilla (@Jsevillamol), which is precisely the CEO of COPHAI and has a very clear and personal vision on how the tests should be to measure the ability of an AI model. To begin with, he points out, “you need to have a way of measuring how the AI ​​is advancing. Interacting with it can give you perspective, but you do not have a rigorous impression of where it will arrive and in what domains it is most expert.” That, he explains, makes it necessary to have standardized test batteries that allow us to form an idea of ​​their skills. For this expert the Benchmark Arc-AGI is more representative of that other vision, making an easy benchmark for humans but difficult for AI. The models are improving in Arc-Agi, but for him that was obvious and that had to happen. With yours the tests are difficult for each other, and that the models advance and are increasingly better when solving these problems is not so obvious. Thus, with FrontierMath they wanted to “try to measure if AI can solve genuinely difficult problems.” Until now the mathematical problems that were subjected to the AI ​​models were relatively easy, so the models “saturated the benchmarks”, that is, they soon managed to overcome all these tests and achieve a 100% score. “It will be a challenge to saturate this benchmark“He stressed. Here I set an example with OPENAI’s O3-mini model, which already solves 10% of FrontierMath. It is not much, but it is brutal, he says, and has already surpassed expert mathematicians like himself. However, he says, “That the AI ​​overcomes certain benchmarks does not mean that it can operate as a human expert. You have to adjust them because they are adjusted to very specific scenarios. We are measuring those limits of that AI, and that will be a continuous process.” For Seville … Read more

We have created 200 sorghum varieties. It looks like an anecdote but it has the potential to change world food

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The sorghum It is not one of the best known crops for the Mediterranean diet but there are those who predict a brilliant future to this cereal. One of his strengths is not in what he has except what he lacks: gluten. Another feature that could bring this food closer to our dishes is in its resistance. Or that’s what some researchers are looking for. To hunt varieties. Researchers such as Melinda Yerka, from the University of Nevada in Reno, responsible for the development of 200 variants of this seed. The objective is to create drought more resistant varieties capable of rooting and producing livestock and people in a changing climate context. Fifth in discord. Sorghum is not a regular of our dishes but it is one of cereal crops most important worldwide after the “great three” (rice, wheat and corn) and barley. FAO (the United Nations Food and Agriculture Organization) esteem that in 2022 there were about 58 million tons of this grain, being the largest producers Nigeria, Sudan and the United States. In the US, the sorghum is mainly used to feed cattle, but this grain can be and is widely used as food. Sorghum is a known gluten -free cereal of the gastronomies of several countries in Asia and Africa, the latter continent from which it is originally. This cereal can even be used fermented as wheat and barley to Create beers or in the preparation of biofuels. Great tolerance. Beyond the uses to which this grain can be dedicated, if something highlights the Yerka team is the resistance of the new variants created. The preliminary studies of the team highlighted their great tolerance against drought although some variants with high levels of protein and digestible starch also highlighted. Based on these first analyzes, the team estimates that the seeds achieve optimal development when they receive between 50.8 and 63.5 centimeters of annual water, considerably less than what crops such as alfalfa require. Prepared for semi-aridity. The new varieties have been created thinking about the semi-aridity conditions of the west of the United States but their developers believe that they could serve farmers from other areas with similar climates worldwide to have at their disposal a new food alternative for their cattle. An alternative with the advantage of requiring lower water use. “Many foods devised for the dairy industry in the US face a fall or variable productions due to late frosts, floods, heat and droughts associated with climate change, which underlines the need for more resilient alternatives that can prosper in conditions of change in the climate,” he explained In a press release Yerka herself. Market the advance. The Yerka Laboratory at Nevada University has been operating Since 2017 But since 2023 it has its own project for the marketing of the fruits of its work, Yerka Seeds. In Xataka | 100 years ago a geneticist toured the world in search of cereals. Today is a “gold mine” for the future of agriculture Image | Melinda Yerka / Mustapha Damilola

The United States created modern globalization. Now he has become his main devastating

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The world never changes from one day to another, but Sometimes there are inflection points that we only recognize in retrospective. The fall of the wall in 1989, the collapse of Bretton Woods in 1971 or the crisis of Lehman Brothers in 2008 marked the end of one era and the beginning of another. Today we are facing a moment, very possibly, similar. The phrase of British politician Darren Jones, “globalization as we have known during the last decades has come to an end,” collected by Newsweekmay sound reactionary exaggeration to Trump’s tariffs, but it is not. We are in something that goes beyond a commercial war. It is the decline of an economic order that has supported world prosperity for three decades. Tara Zahra explains it in The New York Times: It is a moment that reminds the collapse of the first era of globalization after 1913, when the value of global exports went from 14% to 6% of the world economy. The United States was the main architect of this system, but has become his great devastating. The country that was leveled in the virtues of free trade to grow now applies The same base tariff both to its democratic allies and to regimes and the Taliban. In fact we have higher tariffs in the European Union than in North Korea. It is not only the capricious policy of a single president, but the final demonstration of a long process. As Zahra documented, the notice arrived in 1999 with those anti -globalization protests in Seattle that had their replica in various parts of the world. In our case it was In Barcelona. Tens of thousands of protesters against the WTO. That intensified with the 2008 crisis and the pandemic completed this cycle: our supply chains were more fragile than we thought. The world was already fragmenting before Trump’s return to the White House. The alarming thing is what happens on the other side of the Pacific. China is not regretting for anything or waiting for better times with stoic resignationbut is actively building its own independent economic sphere. The case of Huawei It is exemplary: it does not build bridges, cava trenches. Its strategy is no longer going to compete, but to create its own parallel and self -sufficient ecosystem. Beijing in the meantime has been preparing his countermeasures to Trump’s tariffs, from the climbs to his own to the prohibition of American films. They are not only defensive responses, but the steps of a long -term strategy to reduce its exposure and dependence on the West. Beijing creates its technological ecosystems, but also financial and commercial. Within our possibilities, In the EU we are also looking for the box of the strips. Begin An era of independent islands. There are changes that can be reversed when Trump leaves the position and the following arrives, but others will be permanent. Once broken, trust is not easily restored. What happened to Huawei and others in 2019 was A lesson engraved on fire: The dependence of any market (especially the American) is a vulnerability. Praness Narayanan, from the London Public Policy Research Institute, explains it in NBC: “The decisions that make (companies) following this will remodel global trade.” The result will be a more fragmented global system, more redundant and, paradoxically, less efficient that the one that has emerged from globalization. Aurélien Saussay, from the London School of Economics, anticipates That the price to be paid for this “dysglobization” will be transferred to consumers in the form of higher prices and lower supply variety. Many of the pieces that have built the imperfect framework that has given the greatest global prosperity in history are being undone. Just now that AI, climate change and demographic complications should demand more cooperation, no less. The pendulum again oscillate to closed borders and autarchiesto some extent. China wants to be self -sufficient, the United States seeks something similar and the EU, which was to other things, Start wondering what you have left to protect. Now it remains to know what will happen in the future: not if globalization can be saved – it seems very difficult to undo certain steps – but what we will build on their remains. In Xataka | There is a clear winner with the 25% tariffs to the car: it is called byd and represents everything that China has to win Outstanding image | Xataka

So many second -hand cars from Tesla have never been sold. It is the nth proof of the crisis created by Elon Musk

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American policies have taken a 180º turn as far as electric mobility and automobile industry are concerned. In recent years we had become accustomed to fiscal incentives for the purchase of electric cars and their production in North America. In just a few months, Donald Trump has confirmed what we already suspected: is determined to end it. First eliminating tax incentives To buy an electric car, a project that is still underway and that would eliminate the subsidy of 7,500 euros for the purchase of cars of this type. Second with the imposition of 25% tariffs to everything that between its borders. Joe Biden’s government made the Inflation reduction lawin which they contemplated Fiscal aid to those who produce in the country but also to those who centralize their production in North America, including Mexico and Canada with whom the United States has a special commercial treaty. However, the tariffs approved by the new Government of Donald Trump will tax with 25% all cars or pieces for the manufacture of them that enter through their borders, including these last two countries. Curiously, Tesla benefits of both measures. It is not that he draws a direct benefit on them, the problem for the competition is that it affects them more than the company of Elon Musk. Tesla leads in the sale of electric cars in the United States with solvency since they have the best autonomy/price ratio and A supercargators’ own network. Two key aspects in a country with a network of poor loaders. Secondly because they are the only ones that manufacture in the United States all the electric cars that sell in the country. Yeah, Elon Musk has gone to x to throw balls out And say that Tesla will also be affected by tariffs but, of course, It will be to a lesser extent that those who manufacture outside the borders of the United States. And, despite everything, Tesla have to demonstrate that he can keep holding rhythm. Good for the political positions of Donald Trump or because the company begins to find its roof, more and more Tesla electric cars are more in the second -hand market. In fact, according to Reutersthey have never been so much. A second -hand market that is a reflection of much more So many Tesla had never put themselves in the second -hand market in the United States. Is what he states Reuters. The Communication Agency has used the data of Edmundsa well-known portal of second-hand cars in the country. The agency indicates that last month, Tesla represented 1.4% of the transactions that were carried out on the platform. It does not seem a figure too high if it were not because in the same month last year they barely represented 0.4%. That is, in February 2025 they were sold three times more second -hand tesla That a year ago. From the Purchase Portal, they point out that the data is a reflection of how “loyalty to the brand is being reduced (…) Elon Musk’s public participation in the government, concerns about Tesla depreciation and saturation in metropolitan areas are making some owners Insights of Edmunds. The depreciation of cars that have been put on the market, for the moment, has not been felt significantly, collect in Motorpasion. However, they are echoing the notices of the portal itself that warn that if the trend is maintained if they should be noticed very soon. The company is immersed in a Huge image crisis Derived from Elon Musk’s policies, their public appearances and their comments on social networks. Since the new president of the United States took the direction of the country we have seen the Tesla CEO Make Nazi greeting, show off the sound of deportation chains either say goodbye to thousands of people of the American public administration. All this has led to a Boicot to the companywith manifestations, attacks on concessionaires and even a bit more imaginative proposals (such as projecting images In the Tesla factory in Berlin either In Cybertruck themselves) that have been more numerous in France, Germany and, of course, the United States. That image crisis may be deriving in a Substantial Sales Fall of new cars and in the appearance of cars in second -hand portals, although more time is needed To verify to what extent is a trend or it is an internal and structural issue of the company, with a delay in the enrollments due to the arrival of the renewed Tesla Model and. What is palpable is that the disenchantment with the brand has been accentuated over time and, especially, during the last weeks. We have owners who have “disguised” their teslas as vehicles from other companies and, above all, we have a good handful of influencers publishing the sale of their electric cars. Already in September 2024, Automotive News He collected the tendency that Tesla’s owners began to put their cars embarrassed by Elon Musk’s statements during the US elections campaign. These decisions have been extended until they reach personalities with a large public speaker in the United States. From singer Sheryl Crow to actors like Jason Bateman. As we say, to finish understanding these manifestations and that media speaker is generating a real impact On Tesla’s sales we should see how the months continue to advance and check what real impact the arrival of Tesla Model Y. What is certain is that the company has a real problem to sell other vehicles, such as Cybertruck. And also that the number of vehicles in the second -hand market seems to be growing very substantially. Photo | Robbie and Maxim In Xataka | Tesla sold less cars in 2024 than in 2023. It is his first fall in many years despite the fact that he did everything possible to avoid it

If the question is where and when to see the solar eclipse of March 29, NASA has created a map to answer you

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This Saturday 29 we will have a new opportunity to see an eclipse (partial) of sun, at least if we are in an extensive region of the northern hemisphere that covers a good part of Europe (including Spain), but also parts of North America, Africa and Asia, and even a small region of South America. The eclipse, on a map. To help visualize where and when the Eclipse de Sol can be seen, the US space agency, NASA, has published a map in which the region is represented from which this partial eclipse will be visible. The map also includes time information with which to guide us. The yellow lines of the map They allow us to get an idea to what extent the sun covered by the moon will be depending on the place where we find ourselves. The area where more darkness is reached is located on Canada and Greenland, where more than 80% of the solar disc will be covered. The point of greatest concealment will see how it disappears about 93.1% of the disc area. The green lines, meanwhile, indicate the moment in which this maximum solar concealment occurs in each area. The hours are indicated in coordinated universal time (UTC), which during winter coincides with the time of the Canary Islands archipelago. One more hour in the Peninsula and in the Balearic Islands. The dawn line. The orange lines delimit the area where the eclipse will occur during dawn. The points that travel the orange line located further west are the places where the eclipse ends during dawn, while the orange line further to the east shows us where the eclipse begins with dawn. The blue line located between both joins the points where the eclipse will reach its peak during dawn. The map created by NASA to illustrate the eclipse route. NASA Scientific Visualization Studio. Where will you see better. Yes We focus on Spainthe darkness will be greater the more we find ourselves. Thus, for example in A Coruña, 31.6% concealment will be reached, while in Mahón the concealment will be 8.85%. In Madrid and Seville the concealment will be similar, about 20%. Less than in cities such as Gijón or Ponferrada (about 27%), but more than others such as Barcelona or Murcia (around 13.5%). Animated visualization of the areas that will be hidden during the partial eclipse of the sun of March 29. POT. When will it be seen. The eclipse will arrive in the morning and the first autonomous community in being able to see it It will be that of the Canary Islands. Specifically, it will be in the surroundings of the Punta de los Reyes, in El Hierro, where the eclipse will begin at about 9:11, local time. The shadow will move in a northwest direction so that the last point of the Peninsula in being able to see the eclipse will be Euskadi, more specifically in Hondarribia, where the sun will look again fully at 12:41 a.m. On the map We can see how in most of the Peninsula the maximum of the eclipse will occur between 10:30 UTC (11:30, local time or CET), and 11:00 UTC (12:00 CET). Caution. Eclipses are astronomical events easy to seebut dangerous for our view if we do not take precautions. It is essential to use protection if we want to see the eclipse but it is not enough with simple sunglasses, we need specialized glasses to be able to see this type of event without putting the health of our eyes at risk. We also have ways of seeing the eclipse indirectly and safely. In Xataka | The solar eclipse of March 29 is the starting gun for something historical: Spain will see four eclipses in four years Image | NASA Scientific Visualization Studio

More than a decade ago, Seville created a system to defend against Guadalquivir waiting for not having to use it. Last night he had to activate it

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Anyone who was yesterday at the entrance to the Pava Charco, could see how the city’s firefighters They moved the huge gates of defense that shield the city of Seville of the floods of the Guadalquivir River. And it is likely not to know, but I was attending a historical moment: it is the first time since it was built that these steel plates (more than four of meters high and five tons of weight) have to close. Phase 1. Yesterday afternoon, the Hispanic City Council activated the emergency plan in phase 1 and brought together all emergency services (including Local Police, Civil Protection, National Police and 112) to coordinate the necessary measures. 30 people were evicted from a “chabolist settlement” that was in flood zone, control points were installed and It was decided to close The connection that connects La Vega de Triana with the city. That’s where the doors that have just closed are. He has also put the neighbors of Tablada, Valdezorras and El Gordillo on alert. But hadn’t it stopped raining? Yes, weather forecasts They do not show abundant rains In the area and in fact (although the red alert is maintained) the river flow has already begun to decrease in Córdoba. However, when we talk about Seville, the river is just one of the things to take into account. The tide. Although it is often difficult to imagine, the truth is that when the Guadalquivir arrives in Alcalá del Río (that is, 15 kilometers before reaching the municipality of the city of Seville) It is already at sea level. That makes that point more or less, the entire riverbed is subjected to the influence of the tides. And that is what worries the authorities: if the river flood coincides with the pleamar, the chances that the Guadalquivir will overflow begin to be huge. How historical is this really? Indeed, to say that the doors have closed for the first time is not saying too much: they settled in 2012 and the last time the city was on the edge of the debacle It was in 1996. However, the challenge is more than considerable. Because, like Díaz del Olmo explained years agoProfessor of Geography of the University of Seville, the reduction of the alluvial plain of the Guadalquivir (which has gone from 4 kilometers to 500 meters) adds risks to the situation. “It is worth that with the swamps that retain the water, so much alluvial plain is needed, but the current one is not much less sufficient,” he said. And not only for the plain itself, but because “If the river is wide and with meanders, the energy that the water carries is blurred; but if it is narrow and straight, the water acquires a great speed … like the flow of the river rises of the 4,000 cubic meters per second … we have a problem for which they do not serve neither the storm tanks or anything.” A monster called Guadalquivir. Luckily, we are not yet in that situation. However, this is a warning for navigators: taught by tons of concrete, rivers are sleeping monsters, but monsters after all. Just yesterday we talked about The great paradox of our time: Have to prepare for long periods of drought while we have to have infrastructure to contain torrential rains. Today we see that it is not something punctual, it is the true “new normality.” Image | Toni Pomar | ECMWF In Xataka | With the reservoirs to be overflowed with the rains of March, there is a reason for hope on the horizon: the light of the light

The radar satellite at a higher height ever created

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At 36,000 km altitude, in the geostationary orbit, China operates the “Ludi Tance 4-01” satellite. Released in August 2023is the first synthetic opening radar deployed at this point, which gives China a unique permanent observation capacity on a third of the earth’s surface. Freshly declassified. Chinese scientists have Recently revealed The design and capabilities of the Ludi satellite, which had been kept secret until now. Officially designed for weather observation, earthquake monitoring and natural disasters prevention, their details have put on alert to rival countries such as the United States. The United States Space Force rejects the Chinese narrative. Instead of a satellite for civil use, he believes that it is designed for high resolution recognition in the Asia-Pacific region: a powerful spy satellite that allows both civil applications and the collection of military intelligence. The reason for its height. Ludi is, Like the Spanish satellite Paza synthetic opening radar (SAR). But unlike peace, it is the first and unique Sar that operates in geostationary orbit. Located 36,000 km altitude, the Chinese satellite is synchronized with the terrestrial rotation to observe the same region continuously. And not optical, so it can cross the clouds and follow night objects. Ludi reaches a resolution of approximately 20 meters. While it is a lower resolution than the sub -metric of some spy satellites of the low orbit, from the geostationary orbit, Ludi can monitor around a third of the earth’s surface, specifically in the Asia-Pacific region. The technical details. The satellite was launched with its antenna initially folded. To achieve a useful resolution at so much distance, LUDI integrates numerous phase matrix emitters, which can be coordinated in unison. This “beam synthesis” technology allows multiple microwave beams to be combined in space to act as a single very powerful radar beam, which makes it possible to obtain high quality images. Only China. The launch of the Ludi in August 2023 marked the beginning of a new class of Earth’s observation platform. American scientists had pursued the idea of ​​radar surveillance from the geostationary orbit since the Cold War, but technical obstacles maintained all those plans on paper. China has succeeded. And Ludi is alone one of the Chinese satellites yaogan that operate in geostationary orbit. Image | Cast In Xataka | For the first time we have seen a photo taken by the US ultrasecreto space plane. But the most surprising is not the photo

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