discovered

We already knew that we ate plastic. Now science has discovered the exact chaos it causes in our intestines

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We have long realized that we are surrounded by microplastics, both in the water which we take as in food or even the air that we breathe, causing them to appear even in the human placenta. However, there are still many questions about the consequences of having these microplastics in the body, although science continues to take steps to give us an answer about them. how it can alter our general healthand the last thing we know is related to the effect on our digestive system. Ground zero. Something that is already known by almost everyone is that the intestine is full of billions of microorganisms which are essential for our immunity and also for metabolism, making its alteration related even to issues in the central nervous system. But now, science suggests that microplastics can drastically alter the composition and diversity of this ecosystem by destroying some of the bacteria that we harbor inside us to create a completely different environment that can affect our digestion, but also other parts of the body. How it has been seen. To understand how this happens in real time, CSIC researchers developed a sophisticated patented digestion simulation system known as SIMGI. This is mainly based on introducing artificial particles formed by the typical plastic of water bottles into the stomach and colon and observing how it affected bacterial diversity. From here, different investigations have seen that families of beneficial bacteriaas Lachnospiraceae, Oscillospiraceae and Ruminococcaceaeplummet, while the growth of groups that can generate disease is favored. And we must understand that ‘good’ bacteria occupy a space in our intestine so that nothing else can ‘germinate’ there. But logically, if they disappear, they leave their ‘hole’ for other bacteria to pass through. It goes further. But beyond a bacterial imbalance, there is different research that already points to how microplastics destroy the physical barrier we have in our intestine. In this way, scientists have detected that these tiny fragments cause the generation of oxidative stress and, therefore, the overproduction of reactive oxygen species, which only generates great damage to the tissues. But this chemical attack also adds to mechanical damage, which some experts categorize as ‘sandpaper’, since together they manage to reduce the expression of proteins that are key to maintaining the union structure that characterizes the cells that exist in our intestinal wall. The result. If we destroy the scaffolding that maintains the ‘walls’ of our digestive system, the only thing that will be achieved is that increase intestinal permeabilityso any toxin or bacterial molecule will be able to pass from the intestine to the bloodstream, since there is no ‘wall’ that blocks the access of agents that are not wanted in our body. Logically, the passage of toxins without the control of this intestinal barrier activates our immune system defenses, which results in inflammation maintained over time that favors the destruction of tissues and also progresses in important chronic diseases. There is more. As if that were not enough, it is known that microplastics are excellent transport vehicles, since when they come into contact with our biological fluids they become covered with a “protein crown”. This is something really important, since this layer literally camouflages the microplastic and makes it easier for it to adhere to our living cells. But added to all this, we also see that they can act as the perfect support for bacteria and form what is known as biofilms. In this way, microplastic can be seen as a vehicle for external and potentially dangerous microbial communities directly to our tissues. Where are they going? If microplastics alter our barriers, logically the plastic has a free way and that is why it is capable of traveling to different organs such as, for example, the liver, kidneys or brain. And once here, research already indicates that its accumulation is related to DNA damage, deregulation of the immune system or alterations in our entire hormonal system that can lead to chronic diseases. Images | rimufilms on Freepik In Xataka | Researchers analyzed 280 samples of bottled water. Only one of the brands was free of microplastics

We have been thinking for 40 years that Spain escaped Chernobyl because it was far away. AEMET has discovered that it was pure luck

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“When the lava enters the tanks, it will cause approximately 7,000 cubic meters of water to overheat and evaporate, causing a significant thermal explosion. Our estimates are between two and four megatons. It will destroy absolutely everything within a 30-kilometer radius, including the three remaining reactors at Chernobyl. Then, all the radioactive material in the nuclei will be ejected with virulence and propagated by a large seismic wave. It can reach approximately 200 kilometers and could be lethal to the entire population of kyiv and much of Minsk. The radiation release will be immense and will impact Soviet Ukraine, Latvia, Lithuania, Belarus, as well as Poland, Czechoslovakia, Hungary, Romania and East Germany.” Since, to celebrate the 40th anniversary of the Chernobyl disaster, AEMET published meteorological reconstruction that explained why Spain was left out of the radioactive cloud that affected a good part of Europe, I can’t forget those words from the miniseries which HBO released a few years ago. Mostly because it was pure luck. Pure luck? But Ukraine is very far away. That’s what we used to think, that Spain was spared the hardest part of the Chernobyl hit because we were so far away. However, data from meteorologist Benito Jose Fuentes They say something else: three successive atmospheric reconfigurations that, at the critical moment, sent the radioactive cloud in another direction. But let’s go step by step. Indeed, on April 26, 1986, the Chernobyl nuclear power plant became an unstable “pressure cooker” whose explosion spread radiation throughout much of the continent. In fact, that radiation reached Spain shortly after: there is evidence of air filters in Valencia that detected the radioactivity on May 2, 3 and 4. However, we avoided the worst of the blow. According to Fuentes Lópezthe peninsula was at least twice (on April 29 and the days before May 2) “one turn of the wind” away from receiving a direct blow. Reconstructing the disaster. Sources Lopez has published a simplified simulation that reconstructs on a cartographic scale the evolution of the wind at medium and high levels of the atmosphere. This simulation is what gives us the fundamental keys. To begin with, at midday on April 26, a high pressure ridge extended between the Chernobyl zone and Scandinavia. This caused the winds (at 1,700 meters above sea level) to channel the pollutants to the north and Belarus, the Baltic republics, Sweden and Finland took the first hit. The world found out what was happening, precisely, through the sensors of a Swedish nuclear power plant two days later. Spain plays it. On April 29, the pattern changed and a storm in the Mediterranean (and a ridge in Portugal) turned the wind towards Central Europe. According to Fuentes López’s simulations, with this new direction it was a matter of hours before the radioactivity reached Spain. However, between May 1 and 2, a trough pushed the radioactive cloud towards Great Britain (and the Portuguese ridge acted as a wall that diverted the rest of the smaller clouds towards Italy and the Balkans). A reminder. The curious thing about all this is that, according to AEMET datathe dispersion was due to higher atmospheric waves at high levels and not to surface patterns such as storms and anticyclones. That is to say, the work (in addition to a mind-blowing work of atmospheric history) is a reminder that we normally relate to a small part of the weather. That, of course, is a mistake. The atmosphere is a very complex creature full of levels, teleconnections and strange relationships. We are at stake understanding it better. And I am no longer talking about climate change, or phenomena of that type. I’m saying that in most cases, as we already explained many expertsthe profound psychological, social and cultural consequences “turned out to be a much bigger problem than the radiation.” At the climatic level they will also be. And we really don’t know how to handle them well. Image | AEMET In Xataka | We believed that the “elephant’s foot” was the most radioactive point in Chernobyl reactor 4. we were wrong

We attended a crash test and discovered the new (and first) Ebro full electric

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Wuhu has turned out to be quite a surprise. While Beijing has those aromas and that life of what, clearly, is a great capital, Wuhu, although it is enormous, is more reminiscent of that “neighborhood China.” The multi-hundred-story buildings that can accommodate hundreds and hundreds of families make an appearance, of course, but the atmosphere is different. There are restaurants, small shops, it feels more local, more authentic. It is here where Chery, the technological partner of the Spanish company Ebro, whom I accompany on this trip, was born and has its headquarters. And it shows. Not because the hotel we stayed in belongs to the company, that too, but on the road. A walk through Wuhu | Image: Xataka If in Beijing you didn’t see a single Chery car, here they are religion. They are everywhere, wherever you look. The taxis? All Chery. Personal vehicles? Absolute omnipresence of the Tiggo and Arizzo ranges. BYD, Geely, Toyota, Kia and Hyundai are also here, but Chery’s dominance is absolute. Caught | Image: Xataka It’s something normal. China has that component of betting on the local. It is a kind of pride, something to boast about, using a product born in your city and the government promotes it. That’s why BAIC reigns in Beijing and that’s why when they ask you about your cell phone or watch model, they smile a little when they see that, in my case, they are an honor and a Huawei. The same thing happens with Chery, but today it’s not time to talk about Chery, but about Ebro. Chery is the partner technology from the Spanish Ebro, which uses its platforms to sell its own models in Spain, Portugal and, soon, Bulgaria, Slovenia and Croatia. A Ebro s700 It is, at its core, a Chery Tiggo 7. Knowing that, it will not surprise anyone that Ebro’s new model is based on the Chery QQ3 EV. Because yes, Ebro has finally announced a completely electric car which will be produced in its factory in the Free Trade Zone of Barcelona. It still does not have a name and the specifications are not final, since the homologation is missing, but I can tell you a little something, since I have been able to see it in first person. The new electric Ebro | Image: Xataka This car has a clearly urban vocation and is focused on the younger audience. More circular and oval shapes, 2.7 meters between axles and 4.3 meters long give shape to a more compact car and very different from what Ebro has put on the road to date. It is a risky bet for 1) a brand that until now was synonymous with SUVs and 2) a market whose electrification still has a way to go. It has a 42.7 kWh lithium-ferrophosphate battery, which translates into a range of more than 300 kilometers. It has a 90 kW rear axle motor, which allows it to offer, always according to the brand, 122 HP, 111 Nm of maximum torque, 135 km/h maximum speed and acceleration from zero to 100 in less than 11 seconds. At the moment, his name is Ebro BEV | Image: Xataka The power of the charging system has not been revealed, but it will be compatible with AC and DC and will be able to go from 30% to 80% in 30 minutes. Inside the car we find two generous screens, a 15.6-inch floating central one with 2K resolution and a system powered by a Snapdragon chip, and another smaller one, 10.25 inches, in the instrument panel. In China, analog needles and lights have passed away. Interior of the Ebro BEV | Image: Xataka The price has not been revealed either. and the specifications, as we said, are provisional. When the process of industrial adaptation and approval is completed, we will clear up doubts. This is not the only novelty, although it is the most notable. Ebro has taken advantage of the presentation in Chery’s hometown to announce a new version of the Ebro s400 with 1.5 TGDI engine and DHT transmission with two electric motors. This has a power of 224 HP and consumes 5.55 L/100 km. An interesting thing is that it can move in tandem mode (so that the combustion engine generates energy so that the electric one moves the wheels) or in parallel (both engines working at the same time). In theory, this should help reduce the car’s engine noise and improve the lack of “oomph” seen in the previous model. Restyling of the Ebro S800 PHEV. The s700 and S400 maintain the same front grille design | Image: Xataka Ebro also announced a restyling from the s700 and s800with a new front grille with rectangular shapes inspired, according to the firm, in Barcelona, ​​and aesthetic adjustments designed to homogenize the design and give it a more rounded touch. This has been one of the parts of the day, but today I have also been able to witness something that, to date, I had never seen: a crash test. I don’t know, there’s something, let’s say, funny, in seeing a car going towards another knowing that both are going to break down. Under controlled conditions, needless to say. It has a certain charm and, frankly, the real shame is that it lasts so little, because it’s barely a second. New car for sale, few kilometers, one owner, always in a garage | Image: Xataka For the test, Chery placed a Tiggo 9 (remember, the base of an Omoda 9 SHS) at one end of the road. To the other, a Tiggo 7 that rushed towards him at 50 km/h. At the same time that the Tiggo 7 crashed head-on, the Tiggo 9 received a complete impact against a barrier vehicle at 40 km/h from behind. They are, from what they have explained to us, two overlapping forces whose purpose is to bring the test closer to a real environment. To the right and in the background, … Read more

what a new study has discovered studying flies

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The brain is an extremely energy-demanding organ, as it needs a large amount of glucose to function correctly. But sometimes not everything focuses on functioning to live, but also to accumulate new memories or knowledge, something that students who put themselves in front of books need above all. And now we know that sugar can be your best ally. A new paradigm. A priori, we may think that what we eat is like a large amount of gasoline that we pour into the tank we have inside us. However, a recent study published in Nature describes an unprecedented biological mechanism, pointing out that it is not sugar that magically improves memory, but rather it is consuming it after learning something new, such as a study session, that can consolidate it. All this along with a good rest too. What has been seen? Here the researchers subjected a group of flies to aversive learning that began to be spaced out over time, in this way a neutral stimulus was associated with an experience that was detected as unpleasant so that they learned to reject it. Under this pretext, the researchers observed that subjecting the flies to this learning system causes the “hijacking” of the fructose-detecting neurons, which is a type of carbohydrate, in the brain of the flies. There is more. The fascinating thing about all this is that it happens even when the flies are completely full, so the learning generates a kind of temporary “non-homeostatic hunger.” In this way, after the cognitive effort, if the fly ingests sugar, these neurons, which had been disinhibited by learning, become massively activated. And it is something fundamental because activation triggers the release of a hormone called thyrostimulinwhich acts as the definitive signal to consolidate long-term memory. It’s not just about the taste. This article does not come out of nowhere, but already in 2017 a research group showed that the brain is too smart to be fooled by the sweeteners that give us the sweet taste. Here the concept “caloric frustration memory” was introduced, which pointed out that the brain perfectly distinguishes between sweet taste and real energy value. That is why for certain memories to be optimally consolidated, the nutritional value matters as much or more than the simple taste reward. Furthermore, this same French team demonstrated in 2024 that diverting the flow of glucose to neurons plays a vital role in memory memory. fruit fly, and that the metabolic activation of certain areas of the brain is an essential trigger for long-term memory. In humans. Although this is something that has been seen in flies right now, it offers us an incredible window into evolutionary neurobiology. This is something that gives us hope that, at a fundamental level, brains have evolved to link energy availability with metabolic expenditure in order to create new memories. If we look at the literature, there are studies that have analyzed this same effect in our own brains. Specifically, it has been seen that administering glucose can temporarily improve certain cognitive aspects. This is especially noticeable in verbal memory, episodic memory, and in hippocampal-dependent tasks such as object-location binding. Although in no case should you gorge yourself on sugar to be able to learn much faster. Images | Marcos Paulo Prado Daniel Kraus In Xataka | The memory of young people is deteriorating at a record pace. Science thinks it knows why

The James Webb Telescope has finally discovered Saturn’s best kept secret

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Saturn has become a headache for scientists since the Cassini probe in 2004 took action of its rotation speed that did not coincide with the figures accepted in the scientific community. Little by little, new data has been discovered that helps explain this inconsistency, but it has been necessary for the James Webb Space Telescope to come into play to find the definitive answer. Cassini’s incoherence. In 2004, the Cassini probe took advantage of its visit to Saturn to measure some important dataas its rotation speed. Normally this is calculated by analyzing parameters that occur periodically, such as radio emission pulses. It is a very consolidated method, which has been used to calculate the rotation rate of many planets. With Cassini, it was expected to obtain a figure that would coincide with what the Voyager 2 probe had previously taken in 1981. However, to the surprise of the scientists who studied the data, the numbers didn’t add up. A mysterious push. A planet cannot speed up or slow down without an external force driving it. There should be something driving those changes in rotation speed. Or, at the very least, some unknown factor that was falsifying the results. All this was a mystery until 2021, when a team of scientists from the University of Leicester published a study in which new clues were provided. The auroras enter the scene. For a month, scientists at the University of Leicester measured infrared emissions in Saturn’s upper atmosphere. This allowed them to map a series of variable fluxes of activity in the ionosphere, the layer of the atmosphere in which ionized particles are abundant. That is, atoms that have gained or lost electrons and have acquired a negative or positive charge, respectively. These flows were related to the formation of auroras. However, there was something strange. Unlike on other planets, including Earth, a good part of these auroras were produced by the action of rotating winds within Saturn’s own atmosphere, not only by the influence of the magnetosphere. A reminder about the auroras. The auroras are formed when charged particles interact with the atoms that make up a planet’s atmosphere, exciting them and causing the emission of light. Normally, these charged particles come from solar activity, as happens on Earth, or from volcanic eruptions on nearby moons, as happens on Jupiter. Be that as it may, they are concentrated in a region external to the planets, known as the magnetosphere. In the case of Saturn, the 2021 study showed that auroras were also forming within the planet’s own atmosphere. On Earth, auroras are formed by solar activity A puzzle still incomplete. The interaction of molecules and atoms in the atmosphere with charged particles does not only cause the emission of light. It also causes the emission of radiation in other regions of the spectrum. For example, radio pulses. Let us remember that these pulses are the ones that were used to measure the rotation of Saturn. The auroras could be falsifying them. These auroras, as we have seen so far, are produced by the action of rotating winds in Saturn’s own atmosphere. But where do those winds come from? The rock star arrives. The James Webb Space Telescope is the rock star of space telescopes. A state-of-the-art instrument, capable of reaching where other telescopes could not. Therefore, thanks to him, the necessary measurements could be taken to find the origin of Saturn’s winds. Specifically, it has captured the glow caused in the infrared by a molecule in Saturn’s upper atmosphere, called trihydrogen cation. This is very useful, because it acts as a kind of thermometer. It is very susceptible to environmental conditions, so its ionization state helps to know the surrounding temperature. By carefully analyzing its state in different regions of Saturn’s northern hemisphere, it has been possible to make a map of both temperatures and particle density. The missing piece. The temperature and particle density patterns match those predicted in a series of computer models 10 years ago. In these models, these patterns originated when the auroras themselves acted as a heat source. The endless cycle. What happens is this: the auroras, with all their display of light and radiation, heat the atmosphere at a specific point. This heating causes the movement of particles between points at different temperatures, generating a wind charged with electricity. This wind, in turn, propels electrically charged particles, which cause more auroras to form. It’s a vicious circle or, as the authors of the study explaina planetary heat pump. A perfect system that feeds itself. And, of course, the mysterious external factor that upset scientists trying to measure Saturn’s rotation. Image | NASA | Bruce Waters (Wikimedia Commons) | Vincent Guth (Unsplash) In Xataka | James Webb has been detecting red dots in the universe for years: the only problem is that we don’t know what they are

China has just discovered the largest deposit of rare earths in the world. And he did it just when he needed it most.

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China has a privileged position in terms of possession of rare earthbut it has just surprised the world with a new discovery: the Ministry of Natural Resources has confirmed that the Maoniuping deposit, in Sichuan province, is now the largest deposit of light rare earths on the planet. The news comes at a key moment, since it is these minerals that are the protagonists one of the hottest fronts between Beijing and Washington in their tariff war. What exactly has been found. New exploration in the Maoniuping mining area in Mianning county has confirmed the existence of 9.67 million tons of rare earth oxideswhich represents an increase of more than 300% compared to the reserves that were known until now, as announced by the Chinese Ministry of Natural Resources. With this data, the deposit surpasses that of Bayan Obo, in Inner Mongolia, which until now held the title of the largest light rare earth mine in the world with 44 million tons of proven industrial reserves. In addition to rare earth oxides, surveys have identified 27.1 million tons of fluorspar and 37.2 million tons of barite, both classified as deposits of exceptional scale. Why does it matter? Rare earth elements are the 17 elements that make electric car engines, fiber optic amplifiers, advanced weapons systems and smartphones possible, among many other technological elements that we use in our daily lives. Without them, much of the technology and defense industry simply does not work. China already produces more than 80% of the world supply annual of these materials, according to the state agency Xinhua. And this discovery further reinforces China’s position until now. The discovery within the discovery. According to Wang Denghong, director of the Institute of Mineral Resources of the Chinese Academy of Geological Sciences, what is truly striking about the discovery is not only the rare earths but fluorite and barite. Fluorite is an essential ingredient in the manufacturing of semiconductors and lithium-ion batteries. Barite, for its part, is essential in oil and gas extraction: it is used to stabilize wells and prevent blowouts. Without this element, hydrocarbon exploration, including fracking, would be paralyzed. Restrictions. Since April last year, China introduced export restrictions on seven rare earths and permanent magnets, precisely in response to the tariffs imposed by Donald Trump about Chinese products. China controls the gateway to rare earths, and basically any company that wants to take these materials out of the country needs express government authorization. Exports to Europe have picked up since the new licensing regime was implemented. Those going to the United States remain stagnant, according to collect Interesting Engineering. What’s coming now. With this discovery, Beijing consolidates its ability to use critical minerals as diplomatic and commercial leverage. The West has been trying for years diversify your supply chains of rare earths with projects in Australia, Canada or northern Europe, but none yet approach the scale of the Asian country. Cover image | aboodi vesakaran and ZME Science In Xataka | In 2010, Japan learned to acquire its rare earths without depending on China. Germany wants to copy its strategy now

More than 40 years ago we discovered a mysterious hexagon on Saturn. Today there is only one possible explanation

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If there is a planet within the Solar system as enigmatic as it is striking, it is Saturn. And not just because of their rings, probably caused by a collision of their moons. But it’s not the only thing that baffles the scientific community: if you look at Saturn’s north pole from space, you will discover a perfect geometric shape: a hexagon. 30,000 kilometers in diameter. To get the idea, two planets could fit inside it. Of that mysterious hexagon We know that it is there at least since 1981, when the Voyager 2 probe flew over the planet, leaving testimony of its existence. It is not that nature is not capable of making geometric shapes, but the hexagon is not exactly the most common. The latest and most solid hypothesis that attempts to elucidate what Saturn’s hexagon is to date was published in the Proceedings of the National Academy of Sciences offering a possible explanation: the internal dynamics of the planet’s atmosphere. The hypothesis. What the research team from Harvard’s Department of Earth and Planetary Sciences suggests is that the hexagon is not a surface structure, but rather is generated by rotating deep convection inside Saturn. The turbulence of the deep layers of its atmosphere generates vortices that push and bend a high-speed air current that surrounds the north pole, deforming it so much that it acquires its hexagonal shape. The hexagon is not the storm, it is the trace of what happens underneath. Qor why it’s important. Because we have been carrying around the mystery of the hexagon since 1981 and none of the previous theories fit as well as this one, capable of generating the hexagon from basic physics without artifice. Also, it answers a question: how far do Saturn’s winds reach? According to this model, to the bottom. On the other hand, if this explanation is correct, it changes the perception of how we understand the dynamics of giant planets, not just Saturn. Saturn hexagon with images from the Cassini probe. NASA/JPL-Caltech/Space Science Institute context. Before this 2020 theory, there were two clear sides: The forced Rossby wave proposed that the hexagon was an atmospheric wave held in place by an anticyclone, visible south of the pole in Voyager 2 data. When the Cassini probe arrived at Saturn in 2004, there was no trace of that anticyclone. That of the surface jet suggested that the hexagon was a surface wind that, when it becomes unstable, undulates and adopts a polygon shape. The problem was that it needed a starting current. Furthermore, it places the phenomenon in superficial layers, which contradicts the gravitational data of Cassini’s Grand Finale whose gravitational data suggest that Saturn’s winds maintain their intensity up to 100,000 bars of pressure. In both cases, they all reproduced the hexagon if you already gave them a base wind, but none of them generated it from scratch. How have they done it. The methodology is quite abstract, but roughly what they did was simulate a slice of Saturn, spinning it and heating it from below and letting physics act. No winds or hexes in the initial setup. So much the code used in the simulation like the data They are openly available, so anyone can reproduce and verify the results. Yes, but. The hypothesis developed by the Harvard team may be the best so far, but the paper itself recognizes Some objections to take into account. Thus, the simulation polygon is faster than what happens in reality, something that could be solved with a more powerful simulation. The simulation polygon moves faster than what happens in reality, something the authors attribute to the computational power available. Furthermore, the simulation only tests specific conditions and for a relatively short time: no one has yet verified whether the result holds under different parameters or on longer time scales. In Xataka | We have just discovered a true cosmic anomaly: an “invisible” galaxy made up almost 100% of dark matter In Xataka | A new “solar system” has just been discovered. There’s just one problem: it shouldn’t exist. Cover | NASA/JPL-Caltech/Space Science Institute

A new “solar system” has just been discovered. There’s just one problem: it shouldn’t exist.

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Observations from NASA and the European Space Agency telescopes have made possible the discovery of a new exoplanetary system 116 light years from Earth. According to research by an international team led by the University of Warwick published in the journal Sciencethis new “solar system” has a peculiarity: its architecture contradicts the standard model of planetary formation. In short, based on the astrophysics we know, it should not exist. We do not know if it will force us to rewrite current theories, but we do know that we will urgently review them. The discovery. The LHS 1903 system is made up of four planets orbiting a red dwarf, the most common and longest-lived type of star in the universe. The question is how they are arranged: the innermost planet is rocky, the next two are gaseous and surprisingly, the outermost planet (LHS 1903 e) is also rocky. That planet shouldn’t be there. LHS 1903 e It is a large super-Earth (it has 1.7 times the radius of the Earth and 5.79 Earth masses, thus achieving a similar density) located on the periphery, but of course, it should not be in that position, according to current models. It is not a minor anomaly: it breaks the paradigm from the foundations. This provision contradicts the usual pattern that we see in all known planetary systems: the rocky planets (refractory materials) are in the hot zone and the gas giants in the outer cold zone, beyond the “snow line“, where ice makes it possible to grow large nuclei that capture hydrogen. The canonical example is our solar system: the rocky Mercury, Venus, Earth and Mars orbit closer and the gaseous Jupiter, Saturn, Uranus and Neptune orbit further away. Why is it important. According to theory, a planet as large as LHS 1903 e in that cold zone should have devoured gas until it became a giant like Jupiter. But there is another reading: that the formation model fails and is not the only recipe that explains how exoplanetary systems form. But as we mentioned above, red dwarfs are the most abundant stars in the galaxy and if the model fails in this system, it is plausible that it will not hit the mark in much of the cosmos either. There may be other “inverted” systems pending interpretation or that we have misinterpreted. A possible explanation. What the research team proposes is the gas-poor formation mechanism hypothesis. In short, the important thing is not so much where but when. Thus, the planets were formed one after another in the opposite order to our solar system, starting first with the innermost one and going outwards from there. When planets form, they consume the gas available in the disk that surrounds the star. LHS 1903 was formed last, when there was no more gas left, so it could no longer become the gas giant that might have been expected. As explains Lead researcher and University of Warwick professor Thomas Wilson: “It means that the outermost planet formed millions of years after the innermost one. And because it formed later, there really wasn’t enough gas and dust left in the disk to build this planet.” The research method. The data analyzed by the international team comes from the collaboration of NASA’s TESS telescopes and ESA’s CHEOPS exoplanet characterization satellite: the first detects planets with the in-transit method and the second studies them in depth, which allows it to obtain information such as size, mass and, from there, density. Among the alternative hypotheses considered is its birth from impacts between planets or the loss of its gaseous envelope, which they ended up discarding. Astrophysics has pending subjects. Beyond finding a clear mechanism, what seems evident is that observing this system of exoplanets opens up a range of possibilities about how planets form around stars that will last for years. Néstor Espinoza, an astronomer at the Space Telescope Science Institute in Baltimore who was not involved in the study, explains it for CNN: “This system provides a very interesting piece of information that planetary formation models will try to explain for years, and I am sure that we will learn something new about the planetary formation process once they are compared to each other.” In Xataka | How the solar system was formed: for the Earth to be born, a star had to die first In Xataka | We have been deceived by the distances of the Solar System: the closest neighbor to Neptune is Mercury Cover | NASA Hubble Space Telescope

We just discovered that silicon has an invisible bottleneck, and that has a direct impact on our solar panels

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You turn on a solar cell and wait for the electrons to flow. But there is a moment, invisible and very brief, in which a part of them simply stops. A new study published in Physical Review B just explained why. The discovery. Researchers from the Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanoscience) and the Max Planck Institute for Polymer Research in Germany (MPIP) have discovered that, in silicon, photoexcited electrons do not activate immediately when they receive light. For a few picoseconds (millionths of a millionth of a second) they become stuck in small traps of the material before they can circulate and generate current. The person responsible has a name: a phonon bottleneck. What are phonons and why do they matter? Silicon has a peculiarity compared to other materials: for an electron to be released when receiving light, photons are not enough. According to account IMDEA Nanoscience in its note also needs the collaboration of phonons, which are the vibrations of the crystalline lattice of the material itself. As has been discovered, when such timing vibrations are scarce, electrons become temporarily trapped in surface defects near the edge of the energy band. What no one expected to find. Enrique Cánovas himself, one of the authors of the study, recognize that the discovery was accidental. “What we observed was an accident. We expected an instantaneous response, but instead we saw the electrons take a breather,” he says. Until now, the phonon bottleneck was known in high-energy situations, when silicon was excited with very energetic electrons. This is the first experimental record of the phenomenon with low-energy excitations, which occur with near-infrared light, or even below, the absorption threshold of the material. Until now unexplored territory. Why it has practical relevance. Silicon is the heart of the vast majority of solar panels of the world. Any inefficiency in how your electrons respond to light has direct consequences on the performance of those photovoltaic cells. Understanding that this transient delay exists, and that it has an identifiable cause, opens the door to two possible paths: designing materials or structures that minimize this jam, or even taking advantage of it in a controlled way to improve the behavior of the device. It remains to be seen if the impact of this phenomenon is significant enough to justify redesigns in the manufacturing of solar cells and photovoltaic systems. Cover image | yue chan In Xataka | Imitating photosynthesis to transform CO2 into fuel was always a dream. One that has already come true

Researchers have discovered “lost continents” from 4 billion years ago

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The idea we have of the early Earth involves a huge ball of incandescent magma and conditions incompatible with life. The problem? That there are no rocks from 4.3 billion years ago to confirm this consolidated theory. What we do have are some microscopic crystals called zircons. And zircons are telling a different story, according to this study by a research team at the University of Wisconsin-Madison. published in Nature. What zircon says. Regarding the behavior of the Earth’s surface, geology valued two ideas for that period known as Hadean: that there was a plate tectonics where one plate sinks under another or that the Earth had a kind of stagnant lid, a rigid and hot surface where heat only escaped through large columns of magma. Well, neither one nor the other, both: zircons leave evidence of an Earth that already had oceans, liquid water and a crust that alternated both systems. John Valley, the University of Wisconsin-Madison geoscientist who leads the study explains that “There were about 800 million years of Earth’s history in which the surface was already habitable, although we have no fossil evidence and we do not know when life first emerged.” Why it is important. Because they determine that the Earth did not choose a single model, but rather that both processes took place at the same time in different places. Of course, it was not a stable plate tectonics like the one that exists today, but rather it had violent and short episodes of sliding of the edges of one plate under another (subduction) that coexisted with large jets of magma that rose from the interior of the Earth. This discovery is key to understanding how the Earth’s surface moved, the formation of continents and life. On the one hand, without tectonics, the felsic continental crust that floats on the mantle and makes up the lands on which we live would not exist. On the other hand, plate tectonics regulates the climate and recycles nutrients, so knowing when it started working helps understand when the Earth became a place compatible with life. How they analyzed it. The John Valley team analyzed the popular zircons from Jack Hills (Western Australia). These sand-sized minerals are a kind of time capsule, housing the only direct record of Earth’s first 500 million years. They were looking for chemical “fingerprints” that would reveal where and how they were formed, for which they used technology WiscSIMS high resolution. They then compared the results of the analysis with other zirconiums from the Hadic Eon found in Barberton (South Africa). Each one told a different story. Surprises in the “DNA” of the mineral. 47% of oceanic zircons had high levels of Uranium compared to Niobium, indicating that they formed in subduction zones where ocean water sinks into the mantle. On the other hand, the South African zircons show that they were born from virgin rock from the planet’s interior, confirming the classic ‘stagnant lid’ theory by which the Earth’s first solid surface was rigid and immobile. Or what is the same: while in Australia the crust sank and created protocontinents, in what is now South Africa the Earth behaved differently, with a rigid and stagnant crust. That is, the early Earth was a mosaic of tectonic styles. The Earth did not go from being hell to what it is today overnight, but rather it was a hybrid process and generated the necessary conditions for life sooner than we thought. In Xataka | We know it as “the red planet”, but 3.37 billion years ago Mars was almost as blue as Earth In Xataka | 4.5 billion years of Earth’s history, summarized in a spectacular video map Cover | Tomáš Malík and Javier Miranda

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