Mobile Tech & Gadgets

This is the new AliExpress promo for Valentine’s Day

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We start a new month with a very marked date on the calendar: Valentine’s Day. This February we usually see promotions and offers very oriented towards giving a gift for this important date, but also some that are perfect for renewing that device that we already have obsolete. In fact, right now we have a promotion on AliExpress that is ideal for this: it is called Operation Crush and, as usual, it also has several discount coupons. Of course, the stock of several of them comes and goes, so you may not reach all of them. Discount minimum purchase coupon 1 2 euros 15 euros ESCD02 3 euros 29 euros ESCD04 7 euros 49 euros ESCD07 9 euros 69 euros ESCD09 13 euros 99 euros ESCD13 20 euros 159 euros ESCD20 25 euros 209 euros ESCD25 40 euros 329 euros ESCD40 55 euros 459 euros ESCD55 The promo, available until next February 7 at 11:59 p.m.comes as usual with very interesting discounts on technology of all kinds, including mobile phones or consoles that have not been available for long. There is a lot to choose from, but we leave you below a selection of five offers that we find very interesting with the best coupon that is available for them as of writing these lines: Xiaomi Redmi Note 15 Pro+ by 306.49 euros with the coupon ESCD04, a device from this same 2026 that promises to be a bestseller. nintendo switch 2 by 436.09 euros with the coupon ESCD04, in its pack with ‘Mario Kart World’. Xiaomi Redmi Pad 2 Pro by 184.09 euros with the coupon ESCD04, a very interesting quality-price tablet. Xiaomi TV Box S (3rd generation) by 46.78 euros with the coupon ESCD04, ideal to give more possibilities to a TV with several years behind it. Apple AirPods 4 by 92.79 euros with the coupon ESCD04, a good price for the cheapest version of these headphones. Xiaomi Redmi Note 15 Pro+ As a first option we bring you a mobile phone that has been available for very little: the Redmi Note 15 Pro+. Its predecessor was a best-seller last year and this one has what it takes to repeat its same success. What stands out most about it is undoubtedly its battery: a huge 6,500 mAh battery which is also compatible with fast charging of up to 100 W via cable. In addition, it has a good 6.83-inch AMOLED screen compatible with Dolby Vision and HDR10+. It is available for 306.49 euros with the coupon ESCD04 in its version with 8 GB of RAM and 256 GB of storage. Xiaomi Redmi Note 15 Pro+ The price could vary. We earn commission from these links nintendo switch 2 All AliExpress promos open a very interesting window to get a nintendo switch 2. The Japanese company’s console already has enough power to reach 4K resolution when used with its dock, although all without giving up, as the first Switch had already done, its hybrid possibilities. This pack is the one that includes ‘Mario Kart World‘, a game that is ideal for new console. comes out for 436.09 euros with the coupon ESCD04. Nintendo Switch 2 + ‘Mario Kart World’ The price could vary. We earn commission from these links Xiaomi Redmi Pad 2 Pro If we are looking for a tablet with good quality-price, look out for this one Redmi Pad 2 Pro from Xiaomi. This device, with the AliExpress promo, remains in 184.09 euros with the coupon ESCD04. In exchange, we will have a tablet with a large 12.1-inch screen (and 2.5 K resolution), more than enough performance for daily tasks or watching movies and a 12,000 mAh battery that will give us autonomy for the entire day without problem. The price could vary. We earn commission from these links Xiaomi TV Box S (3rd generation) The Xiaomi TV Box S 3rd generation is a device that is ideal for older televisions that we want to give a boost in terms of functions. It connects through an HDMI port and in return offers great performance thanks to Google TV and compatibility with Dolby Atmos, Dolby Vision and HDR 10+. In addition, it also offers the possibility of sending content from your mobile phone. It is available for 46.78 euros with the coupon ESCD04. Xiaomi TV Box S (3rd generation) The price could vary. We earn commission from these links Apple AirPods 4 We close this selection of offers with the Apple Airpods 4in this case the most economical version of them (that is, it comes without active noise cancellation). These headphones arrived in stores for around 150 euros, although this AliExpress promo allows us to purchase them for 92.79 euros with the coupon ESCD04. As usual, they are headphones with very good sound and comfort, as well as an autonomy that reaches up to 30 hours adding the case. It is true that the version with noise cancellation is better, but as a cheaper option these are also very interesting. The price could vary. We earn commission from these links Some of the links in this article are affiliated and may provide a benefit to Xataka. In case of non-availability, offers may vary. Images | Ivan LinaresXiaomi, Nintendo, Apple In Xataka | The best mobile phones, we have tested them and here are their analyzes In Xataka | The best quality-price mobiles. Their analyzes and videos are here

There are no penguin colonies in Ukraine.

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The Vernadsky Research Base It is a Ukrainian scientific station in whose surroundings penguin colonies have been sighted. It happens that it is in Antarctica, not in Ukraine, an enclave where these creatures that live almost exclusively in the southern hemisphere and, in any case, rarely and naturally in the northern hemisphere do not exist. However, in Ukraine they do not stop being sighted. Penguins on the battlefield. Yes, on the Ukrainian front one of the most disconcerting images of this very technological war: Russian soldiers advancing alone through snowy fields covered in white thermal ponchos that, seen at first glance, make them look clearly giant penguins. The logic behind this tactic is simple and desperate at the same time, since these ponchos (can be found by about 75 dollars), made with fabrics capable of retaining almost all body heat, seek to erase the thermal silhouette of the soldier in front of drones equipped with infrared cameras. The “but”. In theory, the human body should blend in with the cold of the environment, disappearing for thermal sensors. In practice and how they have been managed to advertise Ukrainian forces, camouflage only works under very specific conditions and during the night, and their repeated use in broad daylight has turned these “penguins” into targets that are easily identifiable by optical drones, which detect them without difficulty before attacking them. Camouflage as a mistake. The broadcast videos by Ukrainian operators show that the problem is not so much the garment as its tactical use. Ponchos can hide the heat of the torso, but they leave exposed parts like feet or create silhouettes artificially cold images that stand out against slightly warmer backgrounds, making target acquisition easier. Furthermore, the lack of training exacerbates the problem, since many soldiers seem to be unaware how and when use this type of camouflage. The result is paradoxical: what was supposed to reduce visibility ends up generating black and perfectly delimited figures on the thermal screens of the drones, making the carriers even more detectable. Even so, Russian units insist in repeating the tacticagain and again sending isolated men to cross open terrain, with almost always lethal results against explosive-laden FPVs. The battle of deception and decoys. It we have counted before. This extreme resource is not an isolated case, but part of a war of deception every time more sophisticated on both sides. While some soldiers literally try to disguise themselves to survive aerial surveillance, Ukraine has perfected the use of large-scale decoys, like inflatable F-16 fighters deployed at airfields. These life-size models have reached attract loitering munitions guided by satellite, forcing the adversary to expend expensive and technically advanced drones against targets of no military value. Even from the Russian side it has been implicitly recognized that some of their supposed big blows have ended up destroying simple models, an assumed cost that, however, reveals the limits of intelligence and target identification in an environment saturated with sensors. A drone war. If you like, all this costume exchange, thermal ponchos and plastic airplanes underlines a deeper and more repeated reality: the battlefield has been transformed into a permanent duel between detection and concealmentin which drones are responsible for the majority of casualties and set the pace of operations. Improvised human camouflage tactics and elaborate lures Industrial companies are part of the same phenomenon, a war in which deceiving the sensor is almost as important as destroying the enemy. In that context, the somewhat surreal image of a “penguin” advancing through the snow is not so much an anecdote, but the extreme symptom of a conflict in which survival increasingly depends on outwitting a camera that never blinks. Image | Telegram In Xataka | Three Russians surrender on camera: what was previously a “normal” scene in the war in Ukraine is science fiction In Xataka | “They are under our feet”: Ukraine has entered an inexplicable phase, that of its drones attacking Russians at absurd distances

The problem remains that any hotel will photocopy it for you.

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The National Police has announced in a post on X (Twitter) that a new Public Key Infrastructure (PKI) has been implemented of the DNI with new encryption algorithms. Thus, the new system goes from being an RSA 2048 to the so-called Elliptic Curve 384 system. The change is interesting on the one hand. The RSA system is already a classic for data encryption, but it has some disadvantages: it uses large public keys, operations are slower (especially when signing) and it consumes more CPU and bandwidth. With Elliptic Curve 384 bits (ECCusually P-384) allows you to provide a lot of security in small keys. Signatures are much faster, for example, and consume much less CPU and battery, in addition to providing a very high level of security. It is a system with much more future projectionand seems a suitable alternative for the “ID 4.0“of which the National Police speaks. What does this cryptography protect our DNI? These private keys inside the DNIe chip never leave it, and various types of operations are carried out with them: Authentication: prove that you are you, and that it allows you, for example, to connect to the Tax Agency Electronic signature: when we present official procedures or electronic contracts, the DNI “signs” as if it were our physical signature Key exchange: reinforces, for example, the TLS security of secure protocols when browsing if we need that additional layer This new cryptographic system mitigates impersonation even if passwords are stolen in certain scenarios (such as trying to use it for official procedures) because the attacker would need not only “a photo” of the DNI, but the physical DNI, the PIN, and break the ECC 384 encryption, which is practically impossible today. So, the measure is positive, but that is not the problem. The problem is how the DNI is used in Spain. The weakest link These measures are aimed at protecting the data on our ID, but the problem is how this document has become inherently vulnerable because of the way it handles itself in the real world. In fact, the DNI has become a document that we transfer with extraordinary ease. Hotels have been asking for and photocopying our ID for years when checking in.. They cannot and should not do so. The AEPD published a note in June 2025 in which it discussed this issue and concluded that “a copy of the identity document should not be requested.” This document is also usually photocopied or scanned in procedures before a notaryFor example. In this case, the arguments are usually put forward that they have to provide reliable documentation because the money laundering law. The AEPD in fact sanctioned the General Council of Notaries (CGN) for this type of requests last summer of 2025. However and how explained in X cybersecurity expert Román Ramírez, it is another question of “they do not want to commit themselves by attesting that the document you show is the real one. It is a way of “washing your hands,” he explains, because if something happens it is no longer your word against theirs. In fact, we have long recommended that if you have to send a photo of your DNI for any online procedure, it should be done with a watermark. Tools like SafeLayer They facilitate this task but in some cases the entities or companies that request this document object to the shipment with a watermark or do not accept it at all. The curious thing is that the legislation theoretically prevents this type of mass registration of DNIs in cases such as administrative procedures. He Royal Decree 522/2006 of April 28eliminates the obligation to present photocopies of the DNI in the administrative procedures of the General Administration of the State and its dependent organizations. This rule obliges administrations to verify identity data internally, prohibiting requiring physical copies unless expressly opposed by the citizen or specific regulations. This rule does not apply directly to the examples of hotels or notaries, but there the AEPD has also made it clear that the exhibition is enough of the document. No matter what they tell you, do not send your ID as is We should never simply send photos of the ID. Neither by email, nor by WhatsApp, nor through dubious forms, even if the message seems to come from a real company. In fact, if a company asks for your DNI after a theoretical data leak or theft, the best thing we can do is verify it on our own, informing us on its website or calling a legitimate customer service number to find out what is really happening and if this procedure is necessary. The DNI It’s “gold” for scammersbecause it allows: Open fraudulent accounts Request credits or microloans Validate identities in online services Reinforce scams with messages such as “we have your ID, we are from this company or bank.” In fact, this document is a treasure if other data such as contact or telephone number is added to it, because thanks to this information it is possible to carry out much more effective identity theft attacks that can lead to truly dangerous scams and frauds. The DNI has another peculiar problem: it is used as a kind of “universal identifier” in Spain. If it leaks once—if someone steals it or a photo of it ends up in the wrong hands— You can no longer change it like someone changes a password.. You can only renew it, but even then the “old” one is still extremely useful for those phishing attacks. That is why it is important to limit as much as possible where we upload the ID, who has it, and in what format: we should never upload the complete photo unless it is absolutely essential. In Xataka | How to share your ID online safely to avoid dangers

Only once did he bet on a scientist and help us understand it better

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If today we think of an astronaut, we usually imagine someone with advanced scientific training, prepared to live for weeks or months in a challenging environment, master complex systems, robotics and even several languages. But in the sixties, when the space race was a race of speed and prestige, the mold was different: NASA was looking for operational profilespeople capable of making decisions under pressure and flying machines that no one had flown before. That was the pattern that marked almost the entire Apollo program.. And yet, there was one exception that broke the norm: for the first and only time, one of those who set foot on the Moon was specifically selected as a scientist, and that influenced what we learned about it. The protagonist of this exception was Harrison H. “Jack” Schmittand his case is unique within the lunar program. On Apollo there were astronauts with doctorates or advanced technical training, yes, but that does not automatically make them “scientist-astronauts.” The difference is in the selection criteria. Buzz Aldrinfor example, had a doctorate in astronautics, but entered the astronaut corps through the usual route of the military pilot (Group 3), like so many others. In June 1965, according to NASA, a specific group was selected to incorporate scientists, Group 4, and Schmitt was the only member of those members who ended up assigned to a moon landing mission, Apollo 17. The astronaut who came to be a scientist Before becoming an astronaut, Schmitt was already working, literally, with the Moon in mind. According to the USGSin 1964 he joined the Astrogeology team at the Flagstaff Science Center as a geologist after receiving his doctorate from Harvard. participated in lunar geological mapping and led the Lunar Field Geological Methods project, focused on how to do field geology applied to satellite exploration. That experience put him in a unique position within the program: He was not a newcomer to lunar science. After joining NASA, his contribution went beyond flight. The Florida Institute for Human and Machine Cognition highlights who organized the lunar scientific training of the Apollo astronauts, represented the crews during the development of hardware and procedures for exploring on the surface, supervised the final preparation of the descent stage of the Apollo 11 lunar module, in addition to serving as a mission scientist. Apollo 17 was not just another mission within the program. NASA defined it as the last of the three J-type missions, a series characterized by greater hardware capacity, more scientific load and the use of the Lunar Roving Vehiclethe electric rover that expanded the real exploration radius. That explains why the exploration of the Taurus-Littrow valley was not chosen at random. The objective was ambitious: to work in an area where rocks older and younger than those recovered in previous missions could be found. Added to this scientific ambition was an operational design with room to deploy and activate surface experiments, perform sampling, and complete photographic and experimental tasks both in lunar orbit and upon return to Earth. In an interview with the Japanese space agency (JAXA)Schmitt explains that a specialist comes with years of accumulated experience, and that allows him to decide much more quickly what is important and what is not. Schmitt recalls that NASA trained its pilot astronauts to observe well and understand the problems they were working on, but insists that there is no substitute for experiencewhether in geology, medicine or any other discipline. That is the practical logic that sustains their presence in Apollo 17: when the objective is no longer just to arrive, but to interpret an environment and choose samples judiciously, having someone on the ground who has done field geology for years changes the quality of the decisions. And there appears one of the most memorable episodes of Apollo 17. In the middle of the field work in Taurus-Littrow, Schmitt and Eugene Cernan identified the so-called “orange soil”a finding that generated great expectation in the scientific community. Within the framework of the mission, this material has been described as volcanic glass or pyroclastic material, and is interpreted as especially clear evidence of ancient explosive volcanism on the Moon. It wasn’t just a color oddity. It was a clue about the thermal and geological history of the satellite, and a perfect example of why the mission had looked for a place where different materials could appear, older and also younger than those brought by other expeditions. If Schmitt’s story seems strange it is because, within the same group of scientist-astronauts, he was the only one with a lunar destiny. The USGS notes that, From more than 1,000 applicants, six were selectedand that three of them, Joe Kerwin, Owen Garriott and Edward Gibson, would end up flying in Skylab in 1973 and 1974. That is, science, yes, but far from the moon landing. NASA wanted to reinforce the scientific component of manned flight, but the priority of the lunar program remained different and the space for “specialists” was limited. In this context, Schmitt stands out not only for stepping on the Moon, but for what it implies: even within a group created to add science, the moon landing remained almost exclusive territory of the operational profile. Schmitt’s story has value precisely because it is not just a biographical oddity, it is a mirror. In Apollo, the ideal astronaut was an operator, and only once, in the last moon landing, that mold was opened to integrate someone selected for their scientific profile. As we have seen, currently, astronaut training is designed for long and complex missions, with different requirements. And right now, when the moon race looms again, that question makes sense. Since Apollo 17, in 1972, humans have not returned to the surface, but NASA proposes a way back with Artemis, with Artemis II as a manned flyby and Artemis III as the planned moon landing if plans are fulfilled. With China also targeting the satellite, the return is no longer read only in a historical key. Returning … Read more

a revealing map that anticipates several demographic challenges

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The old continent is older than ever, literally. Because Their average age is already around 50 years old. and the birth rate shows that except in Monaco, our sons and daughters they are not enough replacement (the “magic” number is 2.1). So much so that it can be said that Europe is shrinking, something that It hasn’t happened since the black plague. Old Europe vs young Nigeria. The latest Eurostat update gives an average birth rate of 1.38 babies per woman in the EU and 3.6 million births in 2023 for a population that around 450 million. If we set a “Eurovision” and expand the borders, including states like the United Kingdom or Russia, the figure rises to 6.3 million. It is still little, especially if we take into account that only in Nigeria 7.5 million were born in that same year, has a birth rate of 4.5 babies per woman and that the middle ages around 18 years old. A huge lake is in the making. Note: in Nigeria there are 222 million inhabitants. A picture is worth a thousand words. In Brilliant Maps have synthesized this data into a very simple map with this devastating fact that shows the rapid population growth of Sub-Saharan Africa, specifically Nigeria, which has one of the youngest populations in the world. A single country, with a much smaller area, surpasses an entire continent in births. Brilliant Maps map with data from Our World in Data In perspective. Taking United Nations data for Europe and Nigeria from 1900 to 2100 (until 2023 the data is accurate, from then on the UN predictions are used) the evolution and trend leaves no room for doubt about the change produced in the last century in figures: In 1950, 12 million people were born in Europe and 1.7 million in Nigeria, which had a population of 548 and 37 million people respectively. In 2000, 7.3 and 5.5 million were born in Europe and Nigeria, which had a population of 728 and 126 million people. By 2100, less than 5 million births in Europe compared to 6.6 million in Nigeria and 592 million inhabitants for the old continent compared to 476 million in the African country. The turnaround is such that on reddit there is a graph which, although more qualitative than quantitative, sums it up well: The population difference between Europe and Africa. reddit Why is it important. Beyond statistical curiosity, we are facing a paradigm shift that will define the 21st century. If “demography is destiny”, how they attribute to Auguste Comte, Europe aims for change (renew or die, never better said). Of course, Nigeria’s population explosion is not la vie en rose either. In Europe. Europe’s demographic winter is raising alarm bells for its welfare state simply because the population pyramid is inverting, thus threatening its intergenerational social model: first, delaying the retirement age. On the horizon, the cut of benefits even though there are many people who “the cannon life” is not sticking. On the other hand, the market has found a vein in the “silver” economy in the form of care for the elderly: without going any further, those related professions are already applying for rise like foam in the coming years. In Nigeria. Having 7.5 million new people in a territory is quite a challenge. On paper, it is a fantastic opportunity to train and employ a mass population that can drive massive economic growth (as has China in recent decades). The problem is not doing it and finding yourself with unemployed and frustrated youth. On the other hand and regardless of this difficulty, such a high population increase translates into high pressure on its current infrastructure, for example there will be an urgent need to build schools or hospitals. The communicating vessels. Given the previous perspective, the migratory flow is as inevitable as it is necessary. From old Europe, in search of labor to fill vacancies and thus manage its decline without losing its standard of living. From young Nigeria, to alleviate internal population and infrastructure pressure. A symbiosis not exempt from cultural frictions, culminating identity tensions in the rise of the extreme right and the flight of talents in the African country. In Xataka | If you were born today you would be born at 17.5% in India: the map that shows the distribution of world birth rates In Xataka | Where the world’s next 1,000 babies will be born, in a surprising map Cover | Brilliant Maps

Why more and more Gen Z students prefer trades over college degrees

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Forty years ago China decided to invest in training millions of engineers who have turned out Be your ace in the hole in the AI ​​race. In fact, it is the country with the highest number of STEM graduates in the world and while ups its ante on doctoratesboth the government of the Asian giant and generation Z have begun to pay attention to vocational training. The graduate bubble. The Chinese Ministry of Education counted in November 2024 that in 2025 there would be a historic number of graduates: 12.22 million, how to collect the official newspaper of the Central Committee of the Communist Party of China. With this panorama, the competition is fierce, also taking into account that The United States has made visas more difficult for those who decide to migrate. The Chinese Ministry of Education is offering different measures and support systems in the form of recruitment events in key regions and industries to alleviate unemployment among university students. It doesn’t seem enough. Labor demand changes. On the other hand, companies are changing their needs: official data show that the demand for people with a university degree fell from 20.3% to 17.4% last year. However, the number of those who had completed vocational training rose from 8.5 to 11%. The FP is so sought after that this segment was the one that had the highest rate of job offers in 2024. It is already a matter of state. Not only is it a labor market issue, but it is also a guideline that points towards a “Strong Educational Nation.” That is the objective of new state plan in education (2024 – 2035): China makes vocational training a state priority, committing to concrete measures such as more funding, improvements in facilities and the development of a modern skills system. In short, vocational training has the same importance as academic training to sustain technological self-sufficiency. As already happened in Europein China they are also stopping stigmatizing VET as an alternative for students with fewer resources or worse grades. The return on investment is no longer profitable. Sixth Tone picks up the testimonies of several young people and their experiences such as that of Ke Chenxi, who scored high enough on the gaokao (something like the PAU) to go to university, but he chose to enroll in a vocational school. Yes, economic and family circumstances were partly to blame, but also because the Wuhan Vocational Institute program offered shorter early childhood education courses, intensive internships, and faster incorporation into the labor market. Associate Professor of Shanghai Fudan University Gao Shanchuan speaks directly from the “income effect”, that is, from the belief that by going to university you will have a higher salary: “What is changing is that young people are beginning to evaluate education in a more pragmatic way. If vocational training leads to stable jobs and a reasonable income, their social prestige will improve over time.” Zhuo Ping is a teacher at Ke School and is clear that although VET is not going to replace universities, it does encourage students to choose according to their aptitudes and not just prestige: “We went from focusing solely on credentials to more substantially recognizing ability.” Wuhan is the epicenter of change. The Chinese city is a true higher education cluster, with more than 80 universities and a strong weight of technical careers. But also where VET is emerging: those who obtain their degree in trades already find work as quickly as their university counterparts, with a successful access rate to the labor market of over 98% in some institutions. And they do so by accessing the labor market faster and with more experience. That VET centers in Wuhan work closely with local companies to design training according to the needs of the industry and not according to rigid and theoretical itineraries will surely help. In fact, in Sixth Tone they pick up the statements of a human resources supervisor, who experiments with live reality, highlighting their good performance, adaptation and skill, although they have pending issues such as teamwork. In Xataka | China promised them very happy with day 996. Until they realized that it was a shot in the foot In Xataka | China has a huge youth unemployment problem. So much so that some people pay to pretend to work Cover | Green Liu and TruckRun

You are more likely to die on your birthday than the other 364 days of the year.

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Every year we blow out the candles to celebrate that we have circled the sun again; that we are still alive. For most, it is an early and joyful date, but the statistic hides a disturbing reality: the probability of dying is significantly higher on our birthday. The birthday effect. This is the name of this curious statistical phenomenon. It has been observed that mortality increases on the date of the birthday and also in the days close to it, both before and after. Although there are no figures at a global level, numerous studies have been carried out in different populations and in all of them an increase in deaths has been seen on these dates. Because? Studies. The birthday effect has been studied in different populations such as the United Kingdom, Switzerland, the United States, Ukraine, Russia and Japan. With more than 40 years of data, Switzerland has one of the largest studios about this phenomenon and the conclusion is devastating: there is an excess of deaths of 13.8% on birthdays. In the United States, data on more than 25 million deaths were verified and an excess mortality of 6.8% was detected on birthdays and nearby days. The most striking case is that of kyivwith an excess of deaths of 44.4%, although the sample was smaller (just over 100,000 deaths in a ten-year period). Differences by gender. One of the first studies that was done on this phenomenon was in California in 1992 and detected a curious difference between genders: men died more in the week before their birthday and women in the week after. Other studies, such as the one we mentioned from kyiv, have also seen a difference between genders, but focused on quantity: 44.4% of male deaths and 36.2% of female deaths. Age and seasonality. Other relevant patterns have been identified. In the United Statesexcess mortality exceeded 25% in the 20 to 29 year old group. Another revealing fact is the peak deaths on 21st birthdaywhich is just the legal drinking age. There are also times of the year where this effect is clearermainly the month of January. The causes. The main cause is related to typical risk activities in celebrations, mainly the consumption of alcohol and drugs that leads to overdoses or traffic accidents. It is also common for this date to generate an effect known as “birthday depression”a state associated with loneliness, trauma or fear of finitude, which increases suicide rates. In Japan, The risk of suicide increases by 50% on the birthday. Also has been studied in Hungarywhere the risk is 40% higher. Physiological and psychological theories. There are studies that have attempted to relate this excess mortality to physiological causessuggesting the existence of annual biological rhythms that could modulate the risk of death throughout the year. Others point to psychological or psychosomatic reasons: from seriously ill people who “hold on” until their birthday or deaths generated by their own awareness of mortality and the stress that this causes. Image | Imants Kaziļuns in Unsplash In Xataka | The great statistical hoax of life expectancy: it does not mean that in the past we lived less

The complex science behind nose-to-nose contact in the animal kingdom

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The kiss for humans is undoubtedly a summit of human romanticism or the closeness between two people, and when we focus on the animal world and see them doing our ‘Eskimo kiss’ by bringing their noses together, we believe that they also they are romanizing. But the reality is that touching noses mutually is not just a sign of affection, but a high-speed data transfer. What has been seen. A new scientific review published in 2026 in Evolution and Human Behavior has brought order to decades of scattered observations of this type of communication. Their conclusion is quite clear: from bats to pigs and rats, nose-to-nose contact is one of nature’s most sophisticated communication tools. And yes, our human kiss could simply be a version 2.0 of this ancient biological mechanism. The second olfactory system. To understand why animals rub their noses, you first have to understand that most mammals smell the world in stereo, but with two different systems. The first of these is the main olfactory system that detects volatile odors such as the smell of rain. But the second goes much further, since is centered on the vomeronasal system (VMO)which is a structure specialized in detect pheromones and non-volatile substances. Its importance. This second olfactory system is the one that interests us in this case, since the signals captured by this organ do not pass through the usual filters of rational thought; They rapidly project to the amygdala and hypothalamus, the command centers for emotion, aggression, and sexual behavior. This way, when two beavers they bump their noses, they are not “greeting” each other politely; you are injecting pure chemical information about your hormonal status and health directly into your limbic system. The language of noses. The touch of two noses has many more functions than a simple sign of affection, and depending on the species, a touch of the nose can be a sentence of submission or a medical check-up. In the case of rats, nose-to-nose contact is a political tool. The queen uses intense nudging and nose contact not to demonstrate love, but to exert dominance and reproductive suppression. It’s their way of chemically reminding subordinates who’s boss and inhibiting their ability to reproduce. The success of the pigs. In livestock farming and applied ethology, nasal contact between piglets is a performance metric. The studies cited by Rasmussen show a direct correlation: a greater frequency of nasal contacts is associated with greater weight gain and survival. This makes contact function as a social cohesion mechanism that reduces stress and improves the well-being of the group. The hedgehog accident. Although we may think that all contacts are social, in solitary animals such as the European hedgehog it has been documented that many of these encounters are accidental collisions. Basically, since they have very poor vision, they approach each other olfactorily until they collide. What is interesting is what happens next in cats and other small mammals: sudden immobility. The animal “hangs” momentarily processing the chemical sensory overload it has just received. The modern kiss. Although we do something similar with kisses, even with Eskimo kisses, the truth is that we have lost a large part of the functionality of the vomeronasal organ. But it is true that we maintain the behavior. A study carried out in 2023 published in Science dismantled the myth that the kiss is a recent invention, since it was already seen in Mesopotamia and Egypt that The lip-to-lip kiss existed 4,500 years ago. Its meaning. Anthropologists suggest that behaviors such as hongi Maori, the honi Hawaiian or the misnamed “Eskimo kiss” (kunik) of the Inuit are the missing links. In these practices, the goal is not the touch of lips, but rather the sharing of breath and smell in intimate proximity. The human kiss, with all its cultural load, could be an evolutionary remnant of that biological need to get close enough so that our brains could chemically “read” each other. What for a bat is an identity recognition, For us it has become a sign of intimacy, but the underlying hardware has a common origin: the need to communicate what cannot be said with words (or with grunts). Images | Simon Hurry In Xataka | It seemed like a hidden risk for celiac sufferers, but post-pizza kisses do not worry science

We knew that Mars has gravity. Now we have just discovered the unexpected effect it has on the Earth’s climate

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I don’t need to tell you that the Earth’s climate is not constant and it is not just because of the climate change: If we look at it in perspective, throughout the history of the planet it has gone through glaciations and warm periods. Many of these changes find explanation in the Milankovitch cycles or orbital variations, that is, the slow changes in the Earth’s orbit and the inclination of its axis due to the gravitational attraction of other planets. The surprising influence of Mars. It was known that the giant Jupiter or the nearby Venus are largely to blame, but now we have discovered another secondary actor that has gained importance: Mars, as explained this study collected in Publications of the Astronomical Society of the Pacific and led by scientist Stephen Kane. What’s surprising about it? That Mars only has 10% of the mass of the Earth, hence there are simplified climate models that downplay its importance. The simulations. The hypothesis is: what would happen to the Earth’s orbit if Mars were much larger or did not exist? Since human research teams do not have millions of years to wait, they used simulations with a solar system model of ten million years each to study gravitational interactions. The only factor they changed in each simulation was the mass of Mars: from zero (Mars does not exist) to being ten times larger than Earth. Mars “weighs” much more than we think. And the results were conclusive: Mars is directly responsible for the “Great Cycle”, a 2.4 million year gravitational beat in which Mars rhythmically stretches and shrinks the Earth’s orbit, acting as a metronome that regulates the amount of solar radiation received and regulates the frequency of ice ages. Without Mars, that cycle would not exist. However, Kane nuance: “It doesn’t mean that without Mars the Earth wouldn’t have ice ages, but it would completely change the frequency with which they occur.” But if Mars were giant, Earth’s climate cycles would also change: they would be shorter and more extreme, going from an ice age to suffocating heat waves. In short, life adaptation would become more complicated. What would not change, according to the study, is the “great Jupiter – Venus cycle”, the 405,000-year gravitational pattern driven by a secular resonance of both planets that acts as the “master clock” of the Earth’s climate as it is the most stable and constant cycle in the planet’s geological history. Why is it important. Knowing better the influence of the planets around us on the climate is good news that helps us better understand our past and be able to glimpse the future with more precision. But it has an impact on the search for habitable exoplanets: it is not enough to find something similar to Earth, but you also have to look at its neighbors and pay attention to the fine print. That is, if it has a “Mars-type” planet nearby but of great mass, its climate has every chance of being too chaotic for life. In Xataka | Mars has just entered the exclusive club of planets with rays. This is discouraging news for NASA. In Xataka | We had been wondering for decades how Mars could have water, cold and life. Today we finally have an answer Cover | Photo of Planet Volumes in Unsplash

to think that the beach of your childhood was going to be how you remember it

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For decades, coastal architecture was built on such a simple idea as wrongas if the beach of our childhood, the same one we retain in our memories, were going to remain intact forever. Matalascanas is the most recent reminder of a failure of origin: beaches are not everlasting decorations, they are borders that sooner or later are eaten by the ocean. A poorly thought out coast. In Matalascanasthe sea no longer advances in the abstract or in technical reports: it is literally entering the courtyardsdemolishes beach bars and turns boardwalks into twisted rubble. What for decades was a wide, stable beach has lost its protective sand, leaving homes and infrastructure exposed to increasingly stormy weather. more frequent and intense. Built in the sixties and seventies in a high natural erosion zonewithout studies of coastal dynamics and dune systems that acted as a barrier, urbanization embodies the clash between an architecture designed for a fixed sea and a coast that was always in motion. The storms of 2026 have done nothing more than accelerate an announced process for years, generating a feeling of abandonment and urgency in neighbors who see how emergency solutions arrive late and are never definitive. Exception turned into routine. What happened after Storm Francis was not an isolated episode, but rather the start of a sequence. Just weeks later, a new storm has once again placed water at the doors of houses, sweeping away beach bars and reopening unclosed wounds. Erosion is no longer a future threat but has become in a permanent stateaggravated by the lack of coordination between administrations and by provisional actions that barely buy time. In Matalascañas it is no longer discussed whether the sea will advance, but rather how much and at what pacewhile the natural balance that allowed the beach to recover after storms has been broken for two decades. Matalascañas Plug Science takes on the unthinkable. What neighbors experience as a local tragedy, science has been formulating for some time as a global dilemma. Studies in the UK in 2022 now they had warned that hundreds of thousands of coastal homes could be exposed or directly abandoned in a few decades, because protecting them will be economically and technically unfeasible. The message is uncomfortable, but quite clear: there will be communities that must retreat inland. The sea not only rises, it also erodes the beaches and raises the point from which the waves break, multiplying the impact of each storm and rendering many traditional defenses useless. Map of the Earth with a sea level rise of six meters depicted in red Beaches and economies at risk. On a planetary scale, the erosion of sandy beaches is advancing rapidly. uneven but persistent. A significant part of the world’s sandbanks is already receding and projections point to severe losses before mid-century. Tourism, frontline urbanization, ports, dams and dune destruction have eliminated natural reservoirs of sand that allowed the beaches to adapt. In regions highly dependent on coastal tourism, such as the Spanish Mediterranean, the disappearance of the beach is not only an environmental problem, but a direct threat to the economic and social fabric built around it. Barceloneta And the north, the same. Of course, it is not just a problem for Spain. In Scotland, for example, Montrose beach loses meters of sand every year at a rate that even exceeds scientific forecasts. Collapsed promenades, weakened dunes and historic golf courses devoured by the sea show that the problem does not distinguish latitudes. The proposed solutions, such as artificial regeneration with sand, are expensive and recurringa structural expense that is difficult to assume for indebted administrations. The question, again, stops being how to stop erosion and becomes how long can it be buy before the defenses give way. Shrinking cities. In large urban areas such as the same New Yorkthe rising sea threatens tens of thousands of homes in a context of serious housing shortage. I remembered a few months ago the new york times that there the withdrawal is no longer just coastal, but urban: buying houses, demolishing them and returning the land to the water becomes an adaptation strategywhile large protection projects advance slowly and force us to rethink the classic housing model. The coast stops being a place to grow and becomes a mobile border that determines the future of the city. Save house or beach. In the United States, the advance of the sea is of such magnitude that it has reactivated a legal conflict inherited from centuries: the beaches as a public good against the right to protect private property. The walls and breakwaters that save a house condemn the beach by disappearing, causing the call “coastal choke”. The consequence is a waterfall of judicial conflictswhere each individual defense accelerates the erosion of the environment and forces neighbors to follow the same path, until there is no sand left to defend. A “national” problem that aims to be global. Adapt without going out of your way. Of course, all kinds of solutions are being tried. I remembered a few months ago the Guardian the case of the Pacific coast of Colombia, where communities like Juanchaco face erosion from a different logic. Without major works or resources for a total withdrawal, they opt to internal displacementscommunity tourism and progressive adaptation. The sea carries away streets and houses, but the community responds by moving a few meters inland, reinventing its economy and preserving its cultural identity. It is a form of resistance that assumes physical loss without giving up territory. A solution that seems impossible in depending on which enclaves. Houses fall, value sinks. A few months ago it went viral a series of snapshots. Images of homes collapsing on the beaches of North Carolina seemed absurd until you understand their logic. Many were built at a safe distance from the sea, when architecture never imagined that the beaches would change, building on dunes that no longer exist. Accelerated erosion has turned those investments in trapped assetsdifficult to … Read more

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