Mobile Tech & Gadgets

found a 2.5 ton meteorite

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In outer space there are no borders, but once an extraterrestrial flying object (whether identified or not) falls to Earth, things change. And even more so if we talk about a meteorite, an authentic precious stone that fell from the sky because well, apart from being a space souvenir that helps decipher what is in outer space, they are made of materials as coveted as pallasite or even remains of other celestial bodies. Thus, anyone lets a meteorite escape from their domain and it is not because they do not try: without going any further, a 2.5 ton meteorite almost travels halfway around the world pretending to be a decoration for the garden. Where you see a meteorite, I see a garden ornament. In the middle of a routine inspection at the Customs of a port in Saint Petersburg, the Russian Federal Service was found with a large wooden box in which there was supposedly a garden statue. Discrepancies in its declared origin and value led staff to open it and find a large gray rock. The relevant forensic examination confirmed that the fragment came from the Aletai meteoritediscovered in 1898 in northwest China, and has an estimated value of 323 million rubles (about 3.8 million euros). Why is it important. Because if that sample is sold to a private collector, that sample disappears and Aletai is an enormously valuable meteorite: belongs to an extremely rare chemical group, IIIE-an, which contains anomalous amounts of gold, cobalt and iridium, making it unique and irreplaceable. It is 4.5 billion years old, the same age as our Solar System, so it constitutes a good source of information on the formation of planets. Context. The Aletai is anything but just another meteorite (if there can be ordinary meteorites). With a total recovered mass of approximately 74,500 kg, it is one of the largest known iron meteorites. Its fragments are scattered over a radius of more than 400 kilometers in the Xinjiang region, which constitutes another exceptionality: it is one of the largest dispersal fields known on Earth, which has given rise to curious hypotheses about his careerlike it was similar to that of a bouncing stone. That would explain why there is no central crater and why the fragments are distributed linearly. The unanswered questions. The customs authorities have not revealed the identity of the people who were going to export the piece or who was going to receive it in the United Kingdom, nor have they explained how that fragment arrived in Russia or where it was before, given that the meteorite was originally discovered in China. What we do know is that the rock had entered Russia from an unidentified country belonging to the Eurasian Economic Union (where Russia itself is located, but also Armenia, Belarus, Kazakhstan or Kyrgyzstan), which allowed the shipment to be moved with few controls until it reached Saint Petersburg. Russia has launched a criminal investigation for smuggling strategic goods, a crime punishable by up to three years in prison. In Xataka | There has been a Soviet submarine sunk in Norway for 40 years. The problem is that they have just discovered that it leaks radiation In Xataka | In 2018, a mysterious flare illuminated the Bering Sea: it was the largest asteroid explosion in 30 years Cover | jun jin luo and vkvideo

German scientists have discovered that the Earth has been receiving radioactive fallout for more than 100 million years due to the violent “kiss” of two supernovae.

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Planet Earth is home to the ocean depths a radioactive plutonium deposit that could only be formed in space, during a violent cosmic cataclysm. Although there are reserves of this radioactive dust at great depths, it has been proven that it continues to rain down on us today. That would lead one to think that it was a recent cataclysm in astronomical terms. However, according to a recently published study by German scientistsit was hundreds of millions of years ago. Two isotopes to understand everything. Plutonium-244 does not exist naturally on Earth. In fact, the only isotope of this element that can be produced naturally in some geological processes is plutonium-239. and it does so mostly in the form of traces. Plutonium-244 is the heaviest isotope of this element. That is, the one with the most neutrons. It is known that it is usually formed by cosmic phenomena during something known as the r process, where lighter atoms quickly absorb neutrons into their nuclei. Generally, the event that usually gives rise to this phenomenon is the kilonova, an explosion resulting from the merger of two neutron stars. In the process, curium-247 is also formed, which is why these scientists have also analyzed its levels. Taking this data into account, they have discovered that the explosion in question must have occurred more than 100 million years ago, but less than one billion years ago. And, also, that the radioactive fallout has not stopped since then. The key is in the ferromanganese crust. Ferromanganese bark It is a layer of the ocean floor which is formed when metals dissolved in sea water, such as iron and manganese, are deposited and solidify. This occurs at a fairly slow rate, with growth of between 1 and 10 millimeters per million years. The deposits do not only have iron and manganese. Mixed with them are other substances that have fallen into the sea at that time. Therefore, this crust is a perfect chemical photograph of the history of our planet. A section with surprise. The authors of this study analyzed a section of this crust extracted at a depth of 4,830 meters in 1976. This had already been analyzed previously and had pointed out something surprising. And, in addition to plutonium, iron-60 was also found, another radioisotope associated with supernova explosions, which has a fairly short half-life of 2.6 million years. This figure means that, every 2.6 million years, half of the initial atoms of this isotope will have decayed. In another 2.6 million years half of what remained and so on. Since it is a fairly short half-life, it was concluded at the time that the kilonova that caused the fall of radioactive dust took place about 3 million years ago. However, the authors of the study just published debunked that hypothesis. Half-life of the study isotopes Curio to the rescue. The formation of plutonium-244 when neutron stars merge is always accompanied by the formation of curium-247. The plutonium isotope has a half-life of 81 million years, while that of curium “only” has a half-life of 15.6 million years. When analyzing the ferromanganese bark sample, these researchers found no curium. Therefore, it must have completely disintegrated. That places the explosion more than 100 million years ago. Be careful, remember that the half-life is the time it takes for half of the radioactive material to decay. Every 15.6 million years, half of it disintegrates, so in 100 million years there should be no curium left, but a lot of plutonium, which only lost half of it 19 million years ago. For plutonium to completely disappear, it would take 1 billion years. What about iron? The reason why there is iron-60 in the sample, despite having a lower half-life than that of curium-247, is that they originated in different events. In fact, the level changes of iron do not coincide with those of plutonium. On the other hand, it has been seen that plutonium continues to appear uniformly in the upper layers, hence it has been concluded that the radioactive fallout has not ended. At least it hadn’t ended in 1976 and that in astronomical terms was before yesterday. And now what? These scientists think that the cataclysm that released this long radioactive fallout must have been immense. Possibly even affected life on Earth. But at the moment it is something that cannot be known. We will have to continue investigating to have the answer. Image | University of Warwick/Mark Garlick | B. Schröder/HZDR/NASA, ESA, J. Hester, A. Loll/ASU In Xataka | Gravitational waves work their magic: we are closer to revealing the enigmas of neutron stars

The best websites to download free applications and other software safely

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We bring you a small list with the 14 best websites to download applications and programs safelyso you can find the tools you need for your computer. Some pages of this type can end up playing tricks on you by installing programs that you did not want without your permission, so it is a good idea to have on hand those that are safe and recommended. Here, the recommendation is always download the programs from the official website as far as possible. But sometimes, when you want to install more than one or want to find different types of tools, it can also be useful to turn to third-party repositories, and sometimes even the developers themselves may upload their tools there. GitHub We start with GitHub, which continues to be one of the reference portals to find and download open source projects. Its goal is to offer a platform for developers to upload their creations, which can range from tools to games. On the Github pages you will find the source code of these creations, so that everyone can freely access them. In the profiles of most programs uploaded to Github repositories you can also find download sectionswhere you can download the source code or installer of each application or tool. They are clean and safe installers, controlled directly by the developers, who are the ones who decide to offer their program for free. SourceForge It is, together with Github, the other great platform for hosting open source programs. In it, developers will be able to show the rest of the users the code of their tools, and you will also have a download section to download them on the platforms for which they are compatible. It has a voting and comment system so you can see the opinion of other users about each of the projects, and a search engine so you can find the one you need. In addition, in the file for each program you have its license, the list of updates, screenshots and everything you need. AlternativeTo This website has been a great reference for years for those who want find applications similar to others. Come on, if you want an alternative to a certain application, search for that program and it will show you a list of all those that are similar. In both the reference app and the alternatives you will have sheets that tell you about them, and links for downloads. They do not host the programs, they take you to the links of their official websites, notifying you if there is any warning that the tool has recently contained a virus. European Alternatives This is another page where you can find alternatives to popular applications and services, but it focuses on offer you European alternatives. Thus, if for your privacy you prefer to search European alternatives to browsers, office services or social networks, this is the portal to visit. Ninite Ninite It has been one of the most recommended websites for downloading applications for a few years, especially when you need to download several at once and don’t want to have to deal with dozens of downloads. Ninite offers you a single installer to install multiple applications at once selected by you. This makes it an essential portal to equip new computers. Its repertoire of applications is small, but just by entering the website you can see a list with all the available tools organized by categories. So you just have to choose the applications you want to installand then the website will generate a link for you to download them all. MajorGeeks This is a website specialized in the dissemination of freeware, which is what proprietary software is called that, without having to have open source, decides to disseminate completely free of charge. This means that it is the creators themselves who have decided to distribute it for free. All programs offered are of high qualityalthough the catalog is not very extensive. The appearance of the page is old, but keeps updating with great frequency. In addition, this design also means that you can access it from any device. You will install all the applications easily without an installer that tries to sneak in additions. APKMirror All the websites that we have told you so far are designed for computer applications. But this is the most important website to download Android apps. It is the best repository of APK files that you are going to find, although I already warn you that sometimes browsing it is a little confusing due to the lot of advertising it has. The website of this service has an index with the latest app updates, and also a search engine and a category system in which you can discover new applications or games. In addition, you can also find to download the different versions that the same application has had. F-Droid Possibly this is the great alternative to APKMirror when it comes to offering you installable files for your Android mobile. It is another of the pages where you will find the same apps as in the official application stores, but also other completely free ones that are not in them. Flathub This is the reference application store for those looking for Flatpak apps for GNU/Linux. On this website you will find the latest versions of your favorite Linux applications, which They will work for any distribution that you are using. SnapFiles A repository to download all types of applications, with different categories for different types of free app licenselike one for freeware and another for shareware. It also gives you a list of latest releases and some useful app suggestions so you can discover new programs. It also includes a category for portable applications that do not require installation, something useful if you want to carry the most useful ones on a USB. In addition, it also has a list of the best rated ones. In each program you will be able to see … Read more

There was a time when having a thermometer in the car was a luxury. This is how this ingenious invention solved it in the rearview mirror

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Today we have basic elements in our cars that have remained almost in the same place for decades. For example: the thermometer. For many years we have been able to know what temperature it is outside from the comfort of our car (although sometimes we wonder if the sensor works as it should). However, long before this element was incorporated into the instrument panel or the central screen of our car, some manufacturers opted for another place: under the driver’s side mirror. And at a time when analogue predominated, there was no other choice. The luxury America of the seventies The analog thermometer in the exterior mirror It was an invention born in the United States, in the context of the great American luxury cars of the seventies. A time when the most prestigious brands in the country competed to offer the most extravagant equipment possible, from Cartier watches integrated into the dashboard to garage opening systems or autonomy indicators. Click on the image to go to the post The mechanism was simple as well as ingenious. And just as they collect On the Curbside Classic forum, where owners and enthusiasts have debated this type of vehicle accessories for years, the thermometer worked using a spiral spring made of a material sensitive to changes in temperature (normally two metals with very different thermal expansion coefficients, such as brass or iron-nickel alloys). One end of the spring was fixed to the inside of the mirror housing; the other, to the small outer drum. As it expanded or contracted with heat or cold, the spring rotated the drum, which displayed the corresponding temperature on a graduated scale. There were no cables or electronics. It was pure precision mechanics. Additionally, some manufacturers included lighting built into the fixture, either through a light bulb or fiber optic which came from the dashboard (like in some Cadillacs). This last method was better, since it did not generate heat and did not alter the thermometer reading. Cadillac first, Lincoln later The brand that first offered this peculiarity was Cadillac, the jewel in the crown of General Motors. According to they count In The Autopian, Cadillacs equipped these thermometers in the side mirror around 1976, even before its direct rival Lincoln. The Cadillac Seville, the brand’s flagship model at that period, was one of those that included this accessory in its equipment, which was also available in other models in the range such as the Eldorado, the DeVille or the Fleetwood. Thermometer in a Lincoln. Image: Vanguard Motor Sales (Instagram) From Hagerty Media, in an article about the 1976 Cadillac Fleetwood Brougham, they say that the thermometer in the side mirror was an option available in that year’s catalog at a price of $18, which placed it among the most affordable extras within a menu of options that included everything from cruise control ($104) to the alarm system ($114) or the radio cassette ($239). The Buick Park Avenue, GM’s other big bet in the premium segment, also carried it from its early years as an equipment package to differentiate itself from the rest. As it appears on the equipment sheetthe original Park Avenue from 1975 already included the mirror with a thermometer along with other elements such as air conditioning and automatic rear leveling in the suspension. For its part, according to account In the middle, Lincoln, Ford’s luxury division, incorporated the illuminated thermometer into its models starting in 1978. A luxury that is difficult to find today Lincoln rearview mirror with built-in thermometer and wiring for automatic mirror control. Image: eBay Just like express the middle the middle, today it is extraordinarily difficult to find these mirrors in good condition. A mirror with thermometer for a 1988 Lincoln Town Car can reach between $140 and $660 on second-hand platforms such as eBay depending on the condition of the part, while one intended for the 1976-1979 Cadillac Seville can exceed $800. The Lincoln thermometer of the eighties already incorporated the double scale Fahrenheit and Celsius, something that the models of the late seventies did not have, as they only showed the temperature on the Fahrenheit scale. However, Cadillac started getting rid of its analog thermometerssince at the beginning of the 80s they already included more advanced temperature systems in their vehicles where the outside temperature was also displayed in digital format. The leap to digital The arrival of increasingly advanced electronic systems made these thermometers obsolete. In the first half of the 1980s, manufacturers they began to integrate digital screens on the dashboards that showed, among other data, the outside temperature. It was the era of “high-tech”, and digital had enormous appeal for the luxury buyer. The first car with digital instrumentation was the Aston Martin Lagondapresented as a prototype in 1976, although its cathode ray tube technology was too expensive for the mass public (imagine how expensive, if buying an Aston Martin wasn’t exactly cheap in itself). It was the arrival of liquid crystal LCD screens, and in particular the technology TN LCDcheaper and lighter, the one that democratized digital panels in cars during the first half of the eighties. From that moment on, show the outside temperature on a display inside the passenger compartment. It went from being a novelty to an increasingly common featurefirst in premium cars and, over the years, in increasingly accessible segments. In the mid-nineties, it was already a relatively common element in mid-high range cars. And if you have ever wondered where the sensor that measures the temperature and that is reflected on your car’s screen is located, usually It’s on the front bumperaway from the heat of the engine. Seen in perspective, the thermometer in the side mirror was a product of its time, but seeing it today, even in images, gives it a glimpse of very picturesque mechanical elegance. Cover image | The Autopian (eBay) In Xataka | Eddie Hall had a Bentley and many millions in the bank: he used both to set the most unlikely … Read more

Spain has 15 million pets that cannot set foot on a good part of its beaches. That’s something that’s starting to change.

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It comes with going to a park or taking a walk through any city in the country, but in case there were still any doubts, the Government recently provided definitive proof that Spain is a land of pets. The first official census has counted neither more nor less than 15.2 millionof which 7.6 are dogs. With such figures it is better understood that, as summer approaches, more and more people are asking themselves a question: Can we go to the beach with our four-legged friends? The answer is: it depends. Reviewing the figures. We mentioned it before: in Spain there are many (many) pets. It is something that we intuited thanks to the censuses carried out by feed manufacturers, companies dedicated to the care of pets or the Companion Animal Identification Network (REIAC), but which has been confirmed by the first official study of the State. It details that in Spain there are 15,171,569 pets, of which 7,562,893 are dogs. They represent, respectively, 14.1 and 9.6% more than in 2021. Beyond the raw data, the census confirm that in Spain there are now more pets than people under 30 years of age or who live in the country almost double of dogs than small children. Hence the pet economy this awakening the appetite of more and more companies (from feed manufacturers to insurance companies and venture capital) or that, when planning their summer vacations, they have already many families looking for accommodation (or even destinations) pet friendly. To the beach with the dog. Proof of this enormous interest is that every year the blogs specialized in pets (and also some other generalist) publish maps and online guides to dog-friendly beaches during the bathing season, which usually runs from June to September. Their ‘photograph’ does not always coincide, but usually includes more than a hundred sandy beaches. Some place the total count around 130 beaches. Others raise it to more than 150. That disparity is not surprising because the list can change from one year to the next and not all sandy beaches that accept dogs do so in the same way. Fine spinning. Last year, in fact, RTVE published a map in which he differentiated between three main types of beach, depending on the freedom that the dogs had on each one. The most comfortable for pets would be the ‘complete’ beaches, those to which they can freely access all year round. In second place would be the ‘partial’ sandbanks, which tolerate pets, although with small print. For example, the presence of dogs can be restricted to only a defined stretch or a certain time slot, such as at night, when the number of bathers is reduced on the beaches. Finally there would be what RTVE calls ‘nearby’ beachesstretches of coast close to urban areas in which access is allowed in at least part of the sandy area. Why so much complication? Basically, because the Coastal Lawthe framework standard that regulates the maritime-terrestrial public domain, leaves a wide gap that have been covered by the regional and local administrations. And that challenge has not been faced in the same way everywhere. What’s more, sometimes the topic has generated intense social, political and institutional debates. One of the latest examples has been left by Gijón on account of his new ordinance municipal on animal welfare: in March, during the allegations phase, the Principality he was reluctant to the presence of dogs on the city’s beaches, although later nuanced that the decision depends on the City Council. From the beaches to Change.org. Another interesting case is found in A Coruña, where it has been activated a collection of signatures in Change so that the Consistory allows dogs on the beaches in summer in night timefrom 9:30 p.m. to 10:00 a.m. Right now the local ordinance prohibits pets on beaches between June 1 and September 30, with the only exception of the Bens sandy area, which is considered a “dog beach”. Along the Spanish coast there are many more With these characteristics, which are added to other sandy areas where dogs are allowed during the summer, although at night. One figure, two conclusions. let there be between 100 and 150 beaches that can be considered (to a greater or lesser extent) dog-friendly) leaves several conclusions. The first, as recently reported on the Sr.Perro blog, is that the number of sandy areas in which there is a clear regulation that allows enjoyment with dogs is very small. In general, it is estimated that Spain has somewhat more 3,500 beaches. That the proportion is so low is explained, in part, by the requirements that all those sandy areas must comply with opt for the badge of ‘Blue Flag’. The “Guide to Blue Flag criteria” of 2025 states that “the prohibition of domestic animals on the beach must cover the entire area of ​​the candidate beach, including the bathing area.” “Local regulations must prohibit the presence of domestic animals on the beach during bathing season, even outside bathing hours,” the document insistswhich cites WHO studies on “microbiological risks” associated with the presence of excrement on beaches. Gaining weight (little by little). That is the second conclusion that the sandbank map leaves. dog-friendly. Although they remain a minority, some sources they specify that their number has been increasing due to the increase in the pet census and citizen pressure, which sometimes results in campaigns like the one activated this year (also in 2025) in A Coruña. A quick check on Google shows that Sanlucar de Barrameda, Marin, Vila-seca, Cadiz, Punta Umbria either Almeriaamong other populations, have taken steps in recent years (or months) to make it easier for people to enjoy the places of a dip. Image | Nathalie Anfuso (Unsplash) In Xataka | Your cat asks you to cuddle and then bites you. It’s not evil, it’s that you don’t understand its signs

build submarines. The last one weighs five tons and works

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Zhang Shengwu is 60 years old, he is a farmer and has not studied naval engineering, although throughout his long life he has had other jobs that can be assumed to be a handyman, such as a carpenter, welder or in the shipping industry. Back in 2014, Shengwu saw a person on TV building his own submarine and, just like you and I ventured to make a cod pil-pil after seeing Argiñano do it effortlessly (spoiler: it goes wrong), the farmer made the determination to build it for himself. As China Daily tellsnot even his family’s warnings about the risks or the cost stopped him. Just over a decade later, in early July 2025, Zhang Shengwu showed the world his creation with a successful test dive of his “Big Black Fish”, a homemade submarine weighing five tons capable of submerging eight meters, the latest of his creations. It is neither the first submarine he has made nor is it almost certainly the last. Some play petanque, I make submarines. The idea of ​​building a submarine from scratch caught his attention, so he invested 5,000 yuan (approximately 642 euros at the exchange rate) to buy sheet steel, a motor and a battery. In about six months he had built his first prototype, a submarine six meters long, 1.2 meters high, weighing two tons, how Sixth Tone collects. The bad news is that there was a leak. The good news is that the design of its prototype obtained a patent, a formal recognition by the Chinese state of the technical validity of the project. Obviously it didn’t stop there. He then built a surface ship that also got a patent. As Shengwu himself acknowledges, his head is never idle, so he already had the following project in mind: invested 40,000 yuan (just over 5,000 euros) to create the second generation of his submarine, which would later become the Big Black Fish. First submarine built by Zhang Shengwu. CCTV News His masterpiece: he Big Black Fish. He improved and lengthened the hull to seven meters and 1.8 meters high, so that its cabin now seats two people. For more stability, Zhang poured approximately two tons of concrete into the hull as a counterweight and mounted two ballast tanks at the bow and stern: “The tanks collect water to submerge and empty it to float,” explains for Sixth Tone. He didn’t want any more leaks like his previous project, so he welded every joint and installed circular hatches. This boat is capable of reaching speeds of up to four knots and Zhang is especially proud of its performance. So, details that “a small battery and a motor can propel this huge structure underwater. And it can submerge for half an hour without a single drop of water entering, it can even recoil.” Context. For someone to assemble something as complex and unintuitive as a submarine at home sounds exotic, but the reality is that in China it happens relatively often: in 2009 another inventor named Li Yuming Up to five homemade submarines were manufactured. In 2014 a former prison officer named Zhang Junlin He also developed a tourist submarine that he tested in the South China Sea. In 2015, a Shaanxi villager He borrowed 200,000 yuan to make a 9.2-meter one. Why is it important. It is no coincidence: the Chinese government has been betting on rural talent for years. Thus, in 2020 was fixed The goal is to have one million “innovation leaders” and 15 million entrepreneurs in rural areas by 2025. In fact, in Anhui, the province where Zhang Shengwu and the prison officer – inventor come from, these profiles can qualify for a one-time initial subsidy of 5,000 yuan if their activity remains stable for more than six months. Shengwu fits that profile: without a college degree but with a lot of time and persistence, he has successfully executed complex technology. Obviously not at the level of the Chinese army and its submarinesbut in a functional way: it submerges, navigates and rises. AND already have His next submarine in mind, the third: it will be larger and with more autonomy. In Xataka | A Chinese farmer wanted to take his pigs down the mountain by drone. What followed was a ten-hour blackout. In Xataka | Satellite images leave no doubt: China has launched an underwater creature into the sea that defies naval engineering Cover | CCTV and Gemini

build submarines. The last one weighs five tons and works

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Zhang Shengwu is 60 years old, he is a farmer and has not studied naval engineering, although throughout his long life he has had other jobs that can be assumed to be a handyman, such as a carpenter, welder or in the shipping industry. Back in 2014, Shengwu saw a person on TV building his own submarine and, just like you and I ventured to make a cod pil-pil after seeing Argiñano do it effortlessly (spoiler: it goes wrong), the farmer made the determination to build it for himself. As China Daily tellsnot even his family’s warnings about the risks or the cost stopped him. Just over a decade later, in early July 2025, Zhang Shengwu showed the world his creation with a successful test dive of his “Big Black Fish”, a homemade submarine weighing five tons capable of submerging eight meters, the latest of his creations. It is neither the first submarine he has made nor is it almost certainly the last. Some play petanque, I make submarines. The idea of ​​building a submarine from scratch caught his attention, so he invested 5,000 yuan (approximately 642 euros at the exchange rate) to buy sheet steel, a motor and a battery. In about six months he had built his first prototype, a submarine six meters long, 1.2 meters high, weighing two tons, how Sixth Tone collects. The bad news is that there was a leak. The good news is that the design of its prototype obtained a patent, a formal recognition by the Chinese state of the technical validity of the project. Obviously it didn’t stop there. He then built a surface ship that also got a patent. As Shengwu himself acknowledges, his head is never idle, so he already had the following project in mind: invested 40,000 yuan (just over 5,000 euros) to create the second generation of his submarine, which would later become the Big Black Fish. First submarine built by Zhang Shengwu. CCTV News His masterpiece: he Big Black Fish. He improved and lengthened the hull to seven meters and 1.8 meters high, so that its cabin now seats two people. For more stability, Zhang poured approximately two tons of concrete into the hull as a counterweight and mounted two ballast tanks in the bow and stern: “The tanks collect water to submerge and empty it to float,” explains for Sixth Tone. He didn’t want any more leaks like his previous project, so he welded every joint and installed circular hatches. This boat is capable of reaching speeds of up to four knots and Zhang is especially proud of its performance. So, details that “a small battery and a motor can propel this huge structure underwater. And it can submerge for half an hour without a single drop of water entering, it can even recoil.” Context. For someone to assemble something as complex and unintuitive as a submarine at home sounds exotic, but the reality is that in China it happens relatively often: in 2009 another inventor named Li Yuming Up to five homemade submarines were manufactured. In 2014 a former prison officer named Zhang Junlin He also developed a tourist submarine that he tested in the South China Sea. In 2015, a Shaanxi villager He borrowed 200,000 yuan to make a 9.2-meter one. Why is it important. It is no coincidence: the Chinese government has been betting on rural talent for years. Thus, in 2020 was fixed The goal is to have one million “innovation leaders” and 15 million entrepreneurs in rural areas by 2025. In fact, in Anhui, the province where Zhang Shengwu and the prison officer – inventor come from, these profiles can qualify for a one-time initial subsidy of 5,000 yuan if their activity remains stable for more than six months. Shengwu fits that profile: without a college degree but with a lot of time and persistence, he has successfully executed complex technology. Obviously not at the level of the Chinese army and its submarinesbut in a functional way: it submerges, navigates and rises. AND already have His next submarine in mind, the third: it will be larger and with more autonomy. In Xataka | A Chinese farmer wanted to take his pigs down the mountain by drone. What followed was a ten-hour blackout. In Xataka | Satellite images leave no doubt: China has launched an underwater creature into the sea that defies naval engineering Cover | CCTV and Gemini

Luxury homes in the US are selling like hotcakes and experts think they know why: AI

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If you have tried to buy a home in recent months, you will surely have already noticed something: prices are through the roof. Although the joy goes by neighborhood because the real estate market is experiencing a historic split, at least in the United States, as Redfin documents. Thus, while luxury housing is reviving thanks to the gains generated by the AI ​​boom, everything else is paralyzed in a scenario of uncertainty, high mortgage rates, inflation and fear of unemployment. It is the economics in K at its peak, a term coined by economists during the pandemic to refer to a recovery in which the wealthiest segments of society prosper while the rest stagnate or regress. what’s happening. According to the Redfin report Last month, the average sales price of a luxury home in the United States rose 3.6%, to $1.39 million. This figure is more than double the increase recorded in “non-luxury” homes, which increased by 1.4 to stand at $377,734. One fact: Redfin defines “luxury” as homes in the top 5% of the price range in each metropolitan area. At the epicenter of the luxury market, San Francisco: recorded a 48% year-over-year increase in pending sales of luxury homes in April, the highest peak since June 2021. We are talking about a median sales price of $6.7 million, almost 10% more than the previous year. They are followed by other cities such as Tampa (+36%), West Palm Beach (+16%) or Miami (+15%). Why is it important. Because what is happening is not something limited to the real estate market: it is a snapshot of economic inequality in real time. The stock market and the rise of artificial intelligence are accelerating this dynamic. Thus, those who have their assets invested in technology stocks are becoming exponentially richer and then spending part of their profits on the purchase of luxury homes regardless of interest rates, something that does affect and worry the middle classes. The housing has historically been the main repository for wealth accumulation, but its access is being restricted to the richest people. The result is a real estate market that operates at two speeds, which has consequences for social stability and long-term access to housing. Context. This 2026, the energy shock derived from the US and Israeli attack on Iran has raised rates again, but as pick up Axiosthis pattern has been repeated several times in recent years: the luxury market recorded a peak in demand in 2021 with the uncertainty generated by the pandemic and also in 2023, when again mortgage rates, inflation and fear of recession stopped the average buyer. The dynamic repeats itself: in times of uncertainty, the most resilient thing is luxury. It doesn’t just happen in the United States. The luxury real estate boom is not just American. Dubai closed 2025 with 500 sales above 10 million dollars (+194% in five years) and prime prices rose 3.2% on a global average, according to the Knight Frank Wealth Report 2026. London is the exception that proves the rule: He raised taxes on large wealth groups and prime prices fell by 4.8% in 2025, so that capital looked for alternative destinations with two clear winners: Madrid and Milan. In fact, the Spanish capital boasts the highest growth in Europe: prime prices rose 6.4% in 2025 with 55% of international buyers, according to Knight Frank. In Milan, Italy’s flat-rate tax regime for new residents has skyrocketed interest: British buyers grew by 260% between 2023 and 2025, according to Il Sole 24 Ore. There is a gap between luxury and affordable housing and the only thing that can accelerate or slow it down is the fiscal framework. In detail. San Francisco real estate companies are clear about what is causing this phenomenon in 2026: “AI money”, people who have shares in those technology companies that are skyrocketing and also profiles that artificial intelligence companies hire with generous bonuses. Daryl Fairweather, chief economist at Redfin, explains that these wealthy buyers have more confidence in the economy and simply move forward despite the uncertainty. The high-end home builder Toll Brothers, details that their buyers are less sensitive to price pressures because they have a good cushion. In fact, cash purchases without the need for a mortgage are reaching historic highs with one neighborhood as a star destination: Manhattan. Yes, but. Other real estate agents have another explanation for the rise in prices: a correction after years of slow sales, as reported by the San Francisco Standard. That is, we do not know how much of this boom is new demand that AI brings under its arm and how much is repressed demand. On the other hand, this phenomenon is geographically concentrated, which limits the possibility of generalizing its conclusions. If we leave the premium market, one thing is clear: global economic uncertainty is an anchor that holds back potential first-home buyers. In Xataka | Second-hand homes were one of the last refuges on the market. Now they are becoming a luxury In Xataka | 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 Cover | Photo of Daniel Barnes in Unsplash

China is strangling critical materials that the US needs for its technology industry. It’s a two speed war

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In early May, Trump went to China on an official trip and took an entourage of CEOs on Air Force One. They were all from the technology (Cristiano Amon, Tim Cook, Elon Musk or Jensen Huang, for example), but also others energy, the space industry or semiconductors. One of them was Jim Anderson of Coherent, who was very interested in something very specific: why China is taking more than necessary in issue export licenses of indium phosphide. Anderson is blown away by indium phosphide for a very specific reason: It’s an essential material for high-speed optical chips. And, although it may seem very specific, it turns out that it is the key piece that the data centers new generation of the United States. And China, as with other strategic materials and metals, is in control. Optical chips. Data centers house miles and miles of visible cables that connect servers to the network and power, but they are not the only ones. Within each device, the chips are linked by cable and it is a functional technology, but with a limit that is beginning to be reached. If you want to improve latency and bandwidth (and, therefore, the performance of artificial intelligence platforms), you must rethink the internal connection to communicate the chips. That’s where optics come into play. By connecting chips by laser, the performance of the equipment is multiplied and Nvidia is so convinced of this that, a few months ago, invested 4 billion dollars in two companies: Lumentum and Coherent. They estimate that, with copper that is at its limit, connecting clusters of thousands of processors by laser is the solution to the physical problem that they are beginning to encounter. They are components with a very high degree of specialization and a series of materials from the rare earth which, as we have said on numerous occasions, are under the control of China. Indium phosphide is not a rare earth derivative, but it is a strategic material. Strangling the market . And therein lies the problem. The United States wants to promote its technological independence (because they have Big Tech, but practically everything is manufactured outside the United States) and, to achieve this, they need a series of materials that are not in their possession. China has that dominancebut with each restriction and veto that is applied to them from the US, they respond with the same currency, but vetoing what American technology companies need so much: rare earth metals. That is why they are classified as minerals, metals and strategic components, and indium phosphide is among them. China produces approximately 70% of the world’s indium and started to apply restrictions to the supply chain in February 2025. This has caused not only prices to skyrocket by 250%, but also American technology companies to pressure to reverse the situation. The main complaint is that, instead of directly blocking the finished products, it slows down the entire process because They are capable of conditioning the export of the materials used to create those products. Therefore, the optical module ecosystem cannot scale as quickly as hyperscalers need. Domino. Taking this situation into account, what is happening with these security systems advanced photonics It is exactly the same as with NAND chips: all the fish are sold for the next few years. In this sense, as consumers we absolutely don’t care because it is something that only affects AI companies, but it is estimated that Lumentum will have everything sold out in 2026, 2027 and… 2028, despite having quadrupled its production. It not only affects American companies, since the Taiwanese VPEC and LandMark Optoelectronics are also suffering interruptions in the supply of the material. And it doesn’t matter if Lumentum or Coherent are multiplying their capacity by opening new plants because the raw materials continue to leave China and, if those export controls are in place, It is an insurmountable funnel. The other side of the coin. On the other hand we have the Chinese industry. In recent years, its technologies have taken a giant leap, expanding its capacity and beginning to make waves in the international conversation with both user level components (RAM memory and computers) and in the high technological spheres (photonics and semiconductors). Because China has detailed the plan to become the world’s leading technological power by 2030 and it is clear that they have both a very defined roadmap and, above all, the materials necessary to achieve that goal and which companies are the ones that will define that future. Huawei or SMIC are two proper namesbut there are others like Yuanjie that have skyrocketed in the stock market. The reason? They are the ones who are creating photonics components for data centers. In Xataka | Huawei no longer competes: it is building its own parallel reality

One would expect that finding a meteorite crater in Spain would be easy, but it has taken more than 20 years to confirm the first one. And it is in Almería

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It is estimated that on Earth About 17,000 meteorites fall a year. However, some break down into unrecoverable fragments and others are mistaken for ordinary rocks. Many may be abandoned at the back of some closet. In fact, to date, only 80,000 meteorites have been located worldwide. But if finding meteorites is complicated, finding their impact craters is much more difficult. The figures speak for themselves. Today, only 196 of these structures have been documented. In Spain, for example, none had been found until very recently. There were two footprints suspected of having been left by a meteorite, one in Azuaranear Zaragoza, and another in the Tabernas basin, between the Almeria towns of Alhama de Almería and Alhabia. The first has been deflating as it has been investigated, but the second has finally been recognized as such by the international scientific community. It’s now official: the first meteorite impact crater has been found in Spain. It wasn’t an earthquake, it was a meteorite. The discovery and description of this crater is the result of research carried out by the University of Almería, the Astrobiology Center and the National Institute of Aerospace Technology (INTA). It all started in 2005, when two scientists from the University of Almería, Juan Antonio Sánchez Garrido and Sebastián Sánchez, set out to study Fat Megabeda much studied rock, which for many years was considered to have seismic origin. However, they found some characteristics that did not fit with what is known as an earthquake. There was an anomaly with platinum group elements, such as iridium, which has been located in many impact craters of meteorites detected in other parts of the Earth and even on other planets. They also tried to search shocked quartz. That is, a form of quartz that, when observed under a microscope, shows a structure displaced along crystallographic planes. It is something that can only happen at exorbitantly high pressures, such as those generated by the impact of a meteorite. Suspicions were becoming clearer. The Gordo Megabed was formed by a seismic movement, it is true, but said movement was caused by a meteorite impacting our planet. The tests continue. Since that discovery was made, the area has been and continues to be excavated and this possible impact crater analyzed. Thus, they have also been found shatter conesknown in Spanish as splintered cones. These are striated and conical fracture surfaces found in rocks that have undergone very high pressure. This pressure is only related to the impact of a meteorite or a nuclear explosion. Since the calculations carried out indicate that this structure is 8 million years old, a nuclear explosion is ruled out. Rock cores extracted in the excavation But that’s not all. Magnetic evidence has also been detected. When a rock is subjected to very high temperatures, it acquires something known as a negative magnetic anomaly. With the impact of a large meteorite, great pressure is generated, which in turn gives rise to an enormous increase in temperature. They can reach more than 2,000ºC. Therefore, it is more than normal for these anomalies to be detected, the monitoring of which has allowed the crater to be delimited in the case of Almería. Or, at least, it allowed us to define where the crater was suspected to be. The Swedes enter the scene. The fact that an impact crater has never been detected in Spain means that Spanish scientists are logically not familiar with this type of anomaly in the rock. For this reason, these scientists from the University of Almería partnered with the rest of the aforementioned institutions, but they also consulted Swedish researchers. In Nordic countries, such as Sweden, Norway and Finland, there are older geological materials, in which several impact craters have been detected. When these scientists joined the investigation, they confirmed the suspicions that had gradually taken over Spanish scientists. They had found the impact crater of a meteorite. The first in Spain. The characteristics of the crater. When we think of a crater we imagine it as a hole clearly drilled into the Earth. Like the typical craters of the Moon. However, we must keep in mind that on Earth there are winds and geological movements, absent on our satellite, that do not leave the craters visible over the years. What these scientists have found is close to the surface in some points, but in others it is buried with a sediment pressure of 800, 900 and even 1,000 meters. Even so, with all of the above, we know that it is a crater with a radius of 5 kilometers, along with a fragmented area that reaches a radius of 24 kilometers. That is, in a way we have the “hole” left by the meteorite and, around it, all the ground that is fractured as a result of the impact. The very edges of the crater are what we see today as mountains. In the video below it can be seen perfectly. And what about the meteorite? There are very well-studied impact craters that have made it possible to calculate the relationship between the size of a meteorite and the radius of the crater it leaves. Taking this and some other factors into account, it is estimated that the meteorite must have measured around 800 meters. All this is what is known so far. The excavations are not over yet. Rock cores are being extracted with them. That is, cylinders of material excavated for subsequent analysis. With this they hope to find even more crushed quartz and new evidence that will allow them to describe more concisely what happened in that area of ​​the Tabernas desert, then submerged under the sea, when a huge meteorite hit it 8 million years ago. Images | SEA In Xataka | In 1724 a meteorite fell in Germany: we have just discovered that it contained a material ‘impossible’ for physics

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