Science

NASA has captured how an entire lake in Canada disappeared in just 15 days. Science has a disturbing explanation

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Seen and unseen. In the spring of 2025 something happened in central Quebec: an entire lake disappeared in a matter of days. Lac Rouge, a 1.4 square kilometer body of water located in the Lac-Walker region of Sept-Rivières, a popular hunting and fishing area in the Waswanipi Cree First Nationdisappeared. It did not dry out little by little as a result of a prolonged lack of rain as for example happens to Moroccoit was something abrupt and silent. What you see on these lines is the before and after photographed by the Landsat 9 satellite NASA from space with a margin of one year (June 2024 on the left and June 2025 on the right). That a lake disappears is scientifically interesting, as is the list of suspects: the shores have soft geology, the terrain has been suffering from forest fires for years, there is a lot of logging and also melting ice. Where is the trick. What happened to the lake. The first sign was a destroyed road, as reported by local people who used it to move around the area: the access road was completely destroyed by water, as NASA explains. CBC echoes the subsequent investigationwhich revealed that the land surrounding the lake had collapsed and that Lac Rouge had been emptied. The lake had water on April 29, 2025 but was completely dry on May 14. I mean, It dried in just 15 days. At that time, the local administration released a statement alerting of the event. But the water didn’t disappear, it just moved around. Instead of following its usual outlet channel, it opened a new channel to the northeast, crossing a 10-kilometer chain of lakes and wetlands until it reached Lac Doda. If you look at the after photo, you will see that it left a mark in the form of light brown sediments. The explanation. Science explains this mechanism called outburst flooda flash overflow flood: a portion of the lake shore suddenly gave way and water quickly escaped through that gap instead of overflowing into existing river channels. He NASA Earth Observatory confirmed that it was the east bank that gave way, originating that new route. This phenomenon is relatively common in lakes of glacial origin with unstable ice barriers, but rare in a lake like Lac Rouge, whose barrier is made of soft sedimentary soil. The underlying physics is common in basin hydrology: a coniferous forest absorbs between 20% and 50% of the rain it receives, according to this meta-study published in Nature. If there is no vegetation cover, the water reaches the soil directly, saturates it and weakens those banks. Hydrologist Younes Alila, from the University of British Columbia, summarizes it like this: Any ground disturbance (e.g. fire, logging or forestry) raises the water table and keeps it high for longer, increasing the risk of extreme flooding. There is no Lake Ninio left, only Masibón. POT Why is it important. Because Lac Rouge is not an isolated case: it is a warning. Climate change is making fires more frequent and melting more irregular, as the IPCC climate change expert group explains in his AR6while intensive logging continues to weaken soils. The combination of both factors in basins with soft geology favors the appearance of these poorly studied and difficult to anticipate events, as warned by a study on the boreal forest and climate change published in Springer Nature. In this case, the direct blow is suffered by the indigenous communities. More than 600 communities depend on the Canadian boreal forest for their livelihood, according to the Boreal Conservation Foundationand events like this disappearance drastically alter the territory’s ecosystems and activities, such as hunting and fishing, from one day to the next. The list of suspects. Considering these risk factors, Lac Rouge had all the cards: The fire. In 2019 and 2023, areas near the lake burned. The 2023 fire was Quebec’s worst in more than a century: it burned 4.5 million hectares, according to this study published in the Canadian Journal of Forest Research. The Guardian echoes from the Quebec Cree forestry department, which concludes that those fires eliminated much of the mature vegetation cover in the Lac Rouge basin, including that bank that gave way. Furthermore, the fires can reduce infiltration and increase runoff. Intensive logging. After the fires, logging companies obtained wood by scarifying the land to facilitate replanting, which worsened even more the hydrological degradation of the basin. The thaw of 2025. The winter of 2025 snowed more than normal and the thaw was rapid, generating a volume of water that those weak banks could not contain. Natural or provoked? The Quebec government classified it as a natural event and did not investigate further. Their argument: Their own forestry studies say that if less than half of a watershed’s forest is damaged, the risk to rivers and lakes is minimal, as Sigma Earth collects. International experts and the Cree community do not accept it: these studies do not take into account that in Lac Rouge the damage accumulated in layers or that climate change makes all this happen with more frequency and intensity, according to the IPCC in its Sixth Assessment Report. It was probably a combination of everything: soft soil and weak shoreline set the stage, rapid snowmelt was the spark, and decades of logging and fires made the system much more fragile than it otherwise would have been. As points out Sigma EarthLac Rouge can be a warning of what is to come if the way this territory is managed is not changed. In Xataka | Chronicle of an announced collapse: the NASA map that shows how quickly Mexico City is sinking In Xataka | The Earth’s seabed has always been a mystery: an amazing 3D map reveals it in unprecedented detail Cover | POT

How Much Protein You Really Need per Day and What Science Says About Supplements to Reach Your Goals

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In the sports world there is a great debate about how much protein should be consumed daily in order to have a good result in the gym and for the muscles to grow. But the truth is that sometimes the figures you hear about the doses you need to take are very high, and that is why it is best to go to the official source where they tell us the most appropriate doses for each person. We are not all the same. The biggest mistake when talking about protein is thinking that there is a universal figure, since recommendations vary drastically depending on whether you spend the day sitting in front of the computer or if you strength train four days a week. This is why authorities have historically established a minimum protein intake to avoid health problems, and not to optimize performance or body composition. The general population. Here the WHO it’s pretty clear pointing out that the minimum protein that should be taken is 0.75-0.8 grams per kilo of weight per day. But we talk about “minimum” and that means that it is not necessarily optimal, and that is why other guides raise this range to 0.8-1 grams per kilo of weight, emphasizing the need to include a source of protein in each meal. In athletes. Things change in this context, since the International Society of Sports Nutrition point Because, if you exercise, you should take between 1.4 and 2 grams of protein per kilo of weight per day, reaching peaks of 2.5 grams in very intense training phases. The supplementation. Achieving 2 grams of protein per kilo of weight can be a real logistical (and digestive) challenge based on chicken breast, eggs and legumes. But this is where the famous protein supplementation comes in, which should not be used as a magic remedy, but as a practical, safe and highly bioavailable tool for healthy people who They need extra protein. It is investigated. Here studies highlight that proteins derived from milk are the ones that offer the best results, although vegetable options such as those derived from soy are not far behind. The undisputed queen is wheywhose main advantage is its rapid absorption and high bioavailability, something that has been seen in clinical trials where greater development of strength and lean mass after exercise was evident. Another of the great supplements is casein, which is the slow-digesting protein, with an “anti-catabolic” effect that prevents prolonged muscle breakdown. In this way, experts point out that it is ideal to take it before sleeping to ensure a constant drip of amino acids during the night, which are nothing more than the bricks that will form the muscles. Images | Alex Saks In Xataka | When adding protein to everything is no longer a good idea: What science says about aging well

If the question is how the Egyptian pyramids were made, science has an idea: hydraulic systems

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Ancient Egypt is recognized for being one of the first hydraulic civilizations in history: they had control over irrigation canals, dams and transportation that was essential for erect and maintain a centralized kingdom for more than three thousand years in a fertile strip surrounded by desert. In the Old Kingdom period (c. 2700–2200 BC), the Egyptians built seven enormous pyramids representing approximately 25 million tons of rock cut, transported and fitted in less than 150 years. How they did it remains a mystery. In that period the pharaohs they ordered stone blocks to be moved at a rate equivalent to 50 tons per hour sustained for decades. There are several hypothesesbut none are satisfactory enough to explain that performance, especially at the beginning. The origin of everything is in Saqqara: the Step Pyramid of Pharaoh Djoser It is the oldest of the great pyramids and the first built entirely of carved stone. This is precisely where a multidisciplinary team proposes for the first time that water was the driving force of its construction. The hydraulic hypothesis. What the research team led by Xavier Landreau proposes is a kind of hydraulic elevator formed by three large structures from the Zoser complex. The Gisr el-Mudir functioned as a retention dam, the southern Dry Trench was the settling tank and the twin shafts (connected by a 200 meter underground tunnel) constituted the lifting mechanism: a huge float that would have raised the blocks from inside the pyramid in cycles of filling and emptying. Water from the desert wadis was channeled and filtered before reaching the vertical wells. When filled, the water buoyantly raised a platform on which the blocks rested, allowing them to be deposited on the upper levels without the need for external ramps and with less labor effort. Why is it important. Firstly, because it provides a coherent functional explanation for three structures at Saqqara whose purpose was not entirely clear. The analysis brings together hydrology, archeology and civil engineering to integrate all these elements into a unified and logical system, possibly making the Saqqara complex the oldest hydraulic infrastructure in history. If the hypothesis is confirmed, it would leave behind the hegemonic belief of ramps and a large amount of labor as a universal solution for building pyramids. A hydraulic lifting system implies efficient management of resources, energy and logistics, by significantly reducing labor. Additionally, it involves even more advanced knowledge of hydraulics. The next question is clear: are there more pyramids in Egypt built like this? Context. Saqqara is on a limestone plateau west of the Nile. How the research team mappedto the west of the complex there was a potential watershed of 400 square kilometers linked to the wadi Taflah, an ancient tributary of the Nile already documented on 18th century maps. This point is important because although today it is a desert plateau, studies of sediments from the complex itself show that during the reign of Djoser the area received intense seasonal runoffwith enough kinetic energy to deposit sediments of water origin inside the structures. In short, there was water available and in quantity. Other historical hypotheses. The most consolidated theories about the construction of the pyramids point to ramps with different geometries combined with levers and sleds. For Giza for example, Jean-Pierre Houdin proposed an interior spiral ramp. For Saqqara, studies collected in the paper itself suggest that the Dry Pit was the main limestone quarry, with short ramps on each side as a supply mechanism. As for the twin wells, the dominant interpretation until now was funerary: the royal tomb of Djoser and the abode of his ka. As for the dry grave, it was considered a quarry or had a ritual function. How have they done it. This research team has not excavated anything: it has combined satellite images of Airbus Pléiadeselevation models from the French IGN and the QGIS GIS to reconstruct the paleohydrology of the environment. From here, they generated 3D models of the complex’s internal architecture with quite popular commercial software such as SolidWorks or SketchUp. Regarding the hydraulic mechanism, they developed their own deliberately simple numerical model to estimate the water consumption and carrying capacity of the system. Yes, but. Using existing data has been both its greatest strength and also its greatest virtue, as the team recognizes. That is, although their study integrates basin topography, hydraulics and internal architecture, they have not accessed the wells or dated the sediments directly. On the other hand, from the perspective of the study of Egypt, stating that the wells are not funerary contradicts decades of consolidated interpretation. On the other hand, it raises a structural question: if those who made the first pyramids in Egypt mastered this hydraulic technology, why are the pyramids after Giza increasingly smaller and poorer? In Xataka | China’s first pipeline network is 4,000 years old and something revolutionary: it was built without the need for kings or nobles In Xataka | What we see in Petra is a city “carved in stone”: what it really hides is an amazing water system Cover | Charles J Sharp

The spike in Google searches after the 2024 eclipse reveals that we continue to ignore science

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It has been known for a long time that It is not healthy to look directly at a solar eclipse. It is said that Socrates himself I already recommended looking at it reflected in the waterbut never directly. However, human beings have a fairly significant tendency to ignore scientific recommendations. This is possibly the reason why in 2024, after an eclipse in the United States, Google searches for the phrase “my eyes hurt” had a very abrupt peak. The time and place coincide. That peak of searches took place on April 8, 2024 at 3:00 p.m. Eastern Time. Just at that moment a solar eclipse was occurring whose strip of totality crossed from Mexico to Canada, passing through the United States. The states where the most searches were carried out were Vermont, Arkansas, Michigan, Ohio and Indiana, all of them immersed in the path of the eclipse. Eclipse retinopathy. When looking directly into sunlight, the retina can suffer serious damage. The condition that occurs is known as eclipse retinopathy and causes symptoms such as photosensitivity, blurred vision and headache. Vision can be affected for months or even permanently in the most severe cases. For this reason, no matter how much it may seem like the sun is covered, we must look at it with adequate protection. No sunglasses or x-rays. We have all heard at some point that it is safe to look at an eclipse through an x-ray or a photo negative. However, this is a myth that can be very dangerous. Sunglasses are not safe either. Generally, These are prepared to filter approximately 99.9% of solar ultraviolet radiation.. However, in the event of an eclipse, in which we look directly at the sun, this protection is needed, added to a filter of 99.999% of visible sunlight. It is necessary to use special eclipse glasses, always with filters approved by the competent authorities. Be careful with binoculars and telescopes. We should also not look directly through telescopes or binoculars without using filters. These are placed outside the lens and protect our retinas from solar radiation when we look through them. If none of this seems right to us, we can always resort to a pinhole camera, which reflects the image of the eclipse on another surface. Something like what Socrates advised about looking at the reflection in the water. It is important to use approved glasses You shouldn’t even look at a total eclipse. When the eclipse is total, the Sun is completely obscured. At that point, we might feel safe without protection. The problem is that it is not easy to calculate the exact moment in which the eclipse will begin to dissolve and with just a little bit of light, just when the Sun begins to reappear, we can damage our retinas. It is important to use protection from the beginning. It wasn’t eclipse retinopathy. In reality, the symptoms of eclipse retinopathy They usually appear several hours after the event. Interestingly, eye pain is not one of these symptoms. Therefore, what all those people were looking for was due to another reason. When we look at the sun, we usually experience a blink reflex that forces us to look away. However, with a solar eclipse the brightness is dimmed enough for this reflection to disappear. As a consequence, we can comfortably look at the Sun and keep our eyes fixed, without blinking. That’s what can make our eyes hurt or feel a burning sensation. Specifically, that is not dangerous. Still, those Google searches show that many people were worried. Many of them may not have used protection and regretted it. Ready for August. Next August 12 we will have the first of the eclipses that make up the Iberian Trio. Many people have already bought tickets to travel to some of the points in the totality zone. There are even those who have gotten tickets for one of the many festivals that will be celebrated for this reason. Whatever plan we choose, the important thing is protection. Maybe, even if we protect ourselves, there will be a peak in Google searches, but it better be because we don’t blink for a while and not because we have really damaged our retinas. Image | Magnific/NASA | POT In Xataka | The trio of eclipses that await Spain on the horizon: an unprecedented and historic chain between 2026 and 2028

The new trailer for ‘GTA VI’ will be out on May 14 at 11:00. The science of astrology says so

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Esperanza Gracia already said it: if Mercury is retrograde, we have to wonder when the third trailer for ‘GTA VI‘. The stars carry millennia guiding humanity, but they also serve something equally important as trying to guess when we’ll see the next Rockstar release. Those responsible for it affirm that the marketing campaign will begin very soon, but a Reddit user tells us about the future: the new trailer for ‘GTA VI’ will arrive next May 14 at 11:00. The most curious thing is that it is not about another leakbut something much more mathematical because the user has been studying the universe for three months and drawing a line that relates the planetary positions for each launch trailer of a Rockstar game since 2007. And just for their effort, Rockstar should give them a treat. ‘GTA VI’ and Pluto Sagittarius The first trailer for ‘GTA VI’ arrived on December 4, 2023 and the second just a year agoon May 6. Rockstar is taking it easy and it is no wonder. Between the ambition and the state of the industry, it seems that the universe has put it on the shoulders of the developer to once again demonstrate what a great blockbuster is that arrives polished from day one. This “universe” thing can be literal. On Reddit (where else), user JalapenoPoppers24 has hanging an extensive message in which, accompanied by graphics, it demonstrates why on May 14 we will have the final trailer for ‘GTA VI’. “Final trailer” refers to the last big trailer before the game’s release (set a year ago for this May 26 before delayed again until November 19), regardless of whether they later publish other videos explaining mechanics and details like that. Science He claims to have spent three months working on this and I could paraphrase, but it seems to me to be one of those dementias that no longer exists and I think that the message must be transmitted exactly as Jalapeno devised it. Here it goes: “I got the exact UTC timestamp of all 26 confirmed Rockstar reveal events from GTA IV onwards (every trailer, every gameplay video, every launch trailer) and analyzed the geocentric ecliptic longitudes of the 9 classic bodies in each release. The spreadsheet got pretty out of hand. Pluto was in Sagittarius in 24 of the 26 posts. Neptune has been in Pisces for 19 of them. The Sun was in Libra, Scorpio or Taurus 58% of the time, when chance would dictate 25%. The Mercury-Sun conjunction (within 8°) appeared in 8 of the 26 posts, which is a third of the sample for a configuration that occurs about 11% of the time in any given year. The graphics are attached. The methodology is in the comments in case anyone wants to verify it. Unappealable The most interesting pattern of the outer planets is the collapse of the Saturn-Pluto separation. From the first RDR2 trailer in 2016 to the RDR2 PC launch trailer in 2019, each release occurred with Saturn and Pluto less than 24° apart, and most less than 15° apart, leading up to the exact Saturn-Pluto conjunction in January 2020. They were running their entire marketing campaign within that aspect. For GTA 6, both Trailer 1 (December 2023) and Trailer 2 (May 2025) were released with Saturn in Pisces and Mars-Saturn in a closed square. The current position of Saturn (Aries, in transition) and the upcoming Sun-Mercury conjunction in mid-Taurus dramatically reduce the window of the next astrological ‘signature’. I graded each day from May 1 to August 31, 2026 based on Rockstar’s historical footprint (Sun sign weight, Mercury sign weight, Saturn sign weight, Sun-Mercury conjunction, Mars-Saturn square, Thursday bonus). The highest scoring date in the entire 123-day window is Thursday, May 14, 2026, with 12 out of 16 points. Sun in Taurus at 23°, Mercury conjunct Sun at 4°, Saturn in Aries, Venus in Leo, Thursday (the 12th of the 26 historical posts). It’s also exactly one week and one day after the anniversary of GTA 6 Trailer 2, AND falls on the same calendar day (the 14th) as GTA V Trailer 2, which Rockstar postponed from November 2 to November 14 in 2012. The 14th is no coincidence. I’ll put a reminder on the calendar. If Trailer 3 comes out on May 14 at 11:00 AM EDT, I want to be remembered.” For all this, Jalapeno has used the NASA JPL Horizons API, but also other sources to draw much more precisely the line that has reached think know when the trailer will be released. Because There is no speculation here, there is science and the same user points out that the margin of error was 30 minutes, but that he managed to refine it to know, exactly, that it will come out at 11 EDT (North American Eastern Time) I confess something: I got lost since the Sun was in Libra, Scorpio or Taurus 58% of the time. I know how to analyze mobile phones, I know advanced lithography, but I leave astrology to the professionals. It’s only clear to me that the 14th is not a coincidence and that I already know that I have to put on the tuxedo to receive the new video. Yes it is very clear I admit that I had a good time writing this, but beyond the joke (no joke, what a great job by JalapenoPoppers24), it is evident that Take-Two and Rockstar They are fine-tuning the machinery facing a marketing campaign that aims to be one of the most brutal we have seen in the industry. The development budget for this installment is unknown, but everything indicates that it will shatter all records and, as I say, sooner rather than later we will have news. A few days ago, Strauss Zelnick, CEO of Take-Two, pointed out that the marketing campaign will begin “soon” and… it makes some sense that the new trailer will be released before May 21. It will be that day when Zelnick … Read more

We have been vaccinating our dogs and cats every year all our lives. Science is seeing that it is not the most correct

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When you have a pet in your care, visits to the veterinarian are mandatory almost every year to receive a check-up and also a vaccination reminder to be completely calm about its health. However, there are some voices that already suggest that we are overvaccinating too much in our country, since applying vaccines year after year is not only unnecessarybut it can pose a risk to the animal. A new paradigm. To understand the problem, we must look at the guides of the World Association of Small Animal Veterinarians (WSAVA) and the Latin American Committee on Vaccinology in Companion Animals (COLAVAC-Iberia). Both institutions have updated their guidelines with a clear message wanting to abandon systematic vaccination schedules and opt for personalized medicine. Two groups. Now the guidelines are to differentiate vaccines into two large groups, the first of which is the “essentials” which are those of distemper, adenovirus and parvovirus in dogs, and panleukopenia, herpesvirus and calicivirus in cats. On the other hand, there would be non-essential ones, which would correspond to leptospirosis. Here, science suggests that essential vaccines generate much longer immunity than we thought, making animals have defenses against these pathogens for a long time. For example, after vaccination in puppies and their first booster, the animals maintain levels of protective antibodies for at least three years, and in many cases it can last up to 9 or 14 years. This means that if we vaccinate every year we are literally ‘pouring’ immunity where there is already a good amount of it. A legal labyrinth. If science seems to have it so clear… What is happening in Spain? Here, most of the autonomous communities only provide that the rabies vaccine is mandatory, making vaccination against parvovirus or distemper only recommended because they logically cause fatal diseases. If we focus on numbers, a recent study Regarding the national protocols, a devastating fact stood out: only 28.6% of the vaccines available for dogs and 42.9% for cats are “adequate” according to WSAVA standards. And the reason is that the industry markets combined vaccines; That is, to give the dog the annual leptospirosis vaccine, the veterinarian uses the viral one that includes parvovirus and distemper, forming overvaccination. A personal solution. To avoid needlessly pricking the animals, what is proposed is that, instead of blindly setting a reminder, a blood test is performed to determine the amount of protective antibodies in the blood. In this case, if the animal has adequate levels, it is not vaccinated that year, and if not, it should be vaccinated. The problem is that this is more expensive than directly giving the vaccine, so the most convenient, fastest and cheapest option is chosen. More personal. The conclusion here is that experts point out that a booster should be applied to essential vaccines every three years, preserving the rabies vaccine, which is the only one legally required and whose deadlines comply with local legislation. Images | freepic.diller on Magnific In Xataka | We have been using our pets to relieve our anxiety. And now the stress is on them

More and more people are looking at invasive species as the new big culinary goldmine. Science has something to say

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Honolulu, Hawaii, is famous for its beaches and the kind of paradise landscapes you dream of when planning your vacation. A few weeks ago, however, one of its most picturesque beaches hosted a contest that sounded like anything but paradise: “Eat the Invaders” (“Eat the invaders”). Although the title may be shocking macabre, in reality it was a fishing tournament in which participants had to capture three invasive species. Then a chef was in charge of preparing them to demonstrate that, in addition to being a huge environmental problem, fish ta’ape, to‘ouch either roi They can be a delicacy. It seems like an anecdote, but that Honolulu tournament is just part of a much bigger problem: the ‘invasivorism‘. What the hell is ‘invasiveness’? The word is confusing, but it refers to a very easy concept to understand: the ‘invasiveness’ It consists of neither more nor less than consuming invasive species. Exactly what encouraged to do a few weeks ago in Honolulu: stop seeing ta’ape or roi as simple invasive species and understand them as something more, an ingredient for delicious dishes. In theory, this does not mean that we give up eradicating them or ignore the damage they cause to local ecosystems. It is simply encouraged to go further and turn the problem into an opportunity. Does it only happen in Hawaii? Not at all. Honolulu residents haven’t invented anything new. Not even the slogan of “Eat the Invaders”, which is actually the title of a series from the ABC network that explores precisely the culinary potential of Australia’s invasive species. In 2025 even the US Fish and Wildlife Service (FWS) used that same hook (“Eat the invaders”) to launch a campaign that encouraged taking advantage of species introduced by man and that now threaten native diversity. “Consumption of invasive species can help protect native fauna and flora. By trapping, trapping and consuming them we can reduce their population and the damage they cause,” claims an article signed by Erin Huggins, from the FWS communications area, which details half a dozen species that represent a problem in the US and “should be considered”: Myocastor coypus, Channa argus, iguana iguanasilver carp and Sus scrofacreatures from other areas of America, Asia or Europe. Sounds good, right? That’s the crux of the matter. At first glance it seems like squaring the circle: an invasive species is combated and in the process a benefit is easily transferred to the entire population. The idea is so powerful that in 2013 even the FAO encouraged fighting jellyfish plagues with a similar slogan: “If you can’t fight them, eat them.” The problem is that there are experts who believe that invasiveness is actually a trap that is tantalizingly easy to fall into. At first it seems like the perfect solution, but it often ends up aggravating the invasions. The issue is of sufficient concern that a group of scientists from several countries, led by the Doñana-CSIC Biological Station, has published an article in Proceedings of the National Academy of Sciences (PNAS) in which he questions the basic argument of invasiveness: that the consumption of invasive species is an intelligent strategy, especially if it ends up turning the capture and exploitation of those same species into a lucrative business. “Encouraging commercialization can create incentives to maintain them instead of eradicating them.” What do they say exactly? That what at first seems like a solution can end up becoming a problem. “Invasivorism is usually presented as a strategy win-win (mutual benefit) based on the idea that the consumption of an invasive species generates wealth while minimizing its impacts”, recognize Fran Officialdegui, researcher at the Doñana-CSIC Biological Station and main author of the article. “But the reality is much more complex, and in many situations, when the problem becomes a business, a resistance to ending it arises.” “What is not often said is that the objectives of commercial exploitation and management of invasive species are, in most cases, opposite,” affects the researcher before warning of the greatest risk: that a market will be generated around foreign species. When this happens to the interest in eradicating them, another that pulls in the opposite direction can be added: the interest in conserving them. Can that really happen? It has already happened, in fact. In their article, the researchers recall the case of the Kamchatka crab (Paralithodes camtschaticus). Although it is a species native to the North Pacific, about 60 years ago the USSR decided to introduce it to the Barents Sea, in the Arctic. There these crustaceans found a place where they could easily expand and ended up becoming a pest. Also in something else: the engine of a prosperous business that over time led to overexploitation. What did the authorities do when fishing threatened to eliminate the theoretically invasive species? Catch limits were set to guarantee the business that had been created. Why are they issuing the warning now? Because, as they remember from the Doñana-CSIC Biological Station, the discourse of invasiveness seems to be settling little by little. And in part this expansion is due to campaigns promoted by companies, administrations and even conservation organizations that are carried away by the motto of “If you can’t beat them, eat them!” that already used years ago the FAO. Officialdegui also warns that what happened in his day with the Kamchatka crab could be replicated in Spain with the Callinectes sapidusor blue crab, a invasive species whose goodness culinary now they start promoting themselves. In fact it is easy to find recipes that explain how to prepare it with rice. “It is very likely that scenarios similar to that of the Kamchatka crab will occur on the peninsula when, once the commercial exploitation of the blue crab is established (Callinectes sapidus), there are declines in its population”, keep it up Officialdegui. In his opinion, invasiveness can help raise social awareness about the risk of exotic species, but that cannot mislead us. “Addressing biological invasions requires long-term commitment, scientific knowledge and coordinated … Read more

The science behind the “sixth vital sign”

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If we observe the traffic on a street, it is easy to see that each person has a speed when walking very different. This is something that may seem like a fact without much relevance, except that going slower can annoy someone who is behind or cause them to let’s lose less fat. But the reality is that science found a correlation between walking speed in middle age and the state of the brain. It has been investigated. Here is a great study published in JAMA in 2019 changed our perspective on how and when we begin to age neurologically. To look for this relationship, the researchers focused on New Zealand, where the development of 904 participants from his childhood until reaching the age of 45. Just when they reached middle age, the researchers measured the subjects’ walking speed at a normal pace, performing a simultaneous cognitive task and maximum speed. And from here all that was left was to cross-check the information. The results. Here it could be seen that the participants who walked slower at age 45 presented accelerated biological aging, evidencing deterioration in multiple organic systems. In addition, these slower walkers also showed worse brain integrity, causing them to have a smaller volume, as if they had aged much earlier. The link with childhood. Surprisingly, neurocognitive dysfunction detected when participants were just 3 years old already predicted slower walking speed in their midlife. In fact, a difference of between 12 and 16 points of IQ between the group of the slowest walkers and that of the fastest. A deterioration sensor. All of this strongly supports the idea of ​​the brain-body nexus, since the relationship between worse cognitive function in childhood and a slow gait at age 45 suggests that the brain acts as an early “sensor” organ for systemic decline driven by genetics, aging, and environmental factors. In this way, walking speed in middle age is no longer seen only as a symptom of old age frailty, but as a true “summary index” of cumulative aging and brain health over a lifetime. It has implications for the future. The preventive potential here is incredible, since an extraordinarily simple evaluation such as timing how long it takes a patient to walk 4 to 6 meters could become a standard tool in medical consultations to assess the patient’s cognitive status. Something that can also be standardized with the use of smartwatches, which today make very precise measurements of the movement we do daily. This would allow specialists to identify people at risk of experiencing accelerated aging and cognitive decline long before reaching old age or meeting the criteria for classic frailty. And having this information is essential to anticipate, for example, the onset of dementia. Images | Drazen Zigic in Magnific rawpixel.com on Magnific In Xataka | Dementia is devastating largely because it arrives without warning: some researchers already predict it seven years in the future

science explains what happens to your body (and your brain) depending on the time you choose

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In social circles, the truth is that there are sometimes very interesting debates about common customs, such as whether it is better to shower first thing in the morning or just before getting into bed. Here, while there is a group of people who defend tooth and nail the revitalizing power of water in the morning to “start” the day, others say that there is nothing like hot water at night to conclude sleep. And here science has something to say. It makes us sleep better. If you have trouble falling asleep, the science here suggests that a nighttime shower may be a good idea, and explained in a meta-analysis published in 2019 in the magazine Sleep Medicine which analyzed 17 different studies. Here it was concluded that bathing or showering with hot water between one and two hours before going to bed reduces the time to fall asleep by approximately 36%. Because? Here hot water is our main ally, since it warms the skin and, therefore, increases blood flow to the extremities such as the hands and feet. From here, when you get out of the shower, that heat dissipates quickly, causing a drop in the body’s core temperature. And this is the key, because this thermal drop mimics the natural cooling that our body experiences before sleeping, which sends an unequivocal signal to the brain to release melatonin, which is the sleep hormone, and reduce levels of cortisol, which is related to stress. It depends on the time. From a psychological point of view, morning and night showers fulfill completely opposite functions and it depends precisely on the time at which we take them. In the case of the morning showerthe goal is increase performance with the activation of the sympathetic system by stimulating muscle tone and, above all, preparing us for the stress of the day. In the case of the night shower, as we have said before, an attempt is made to activate the parasympathetic system with a longer and more leisurely duration of the shower with the aim of reducing the accumulated physical and mental tension, fulfilling the function of an authentic ritual of transition and disconnection. According to psychology. Here we enter territory that is not so clear, but which indicates, for example, that people who prefer a shower at night do so because they have a lower tolerance for dirt, which is why they prefer to remove all the sweat of the day before going to bed. But it is also noted that people who prefer solitude tend to prefer nighttime showers, precisely because, after a day full of stimuli, the bathroom becomes a capsule of sensory disconnection. In the end, it is a way to relax from everything that has happened throughout the day. Images | freepik In Xataka | Cooling down is the forgotten step in our exercise routines. And that affects how we shower

Barbacid’s promising cancer study has been withdrawn. The reason is not science, it is a “hidden” spin-off

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Last December, the team led by the prestigious researcher Mariano Barbacid filled the headlines of the main media with great news: had found a triple therapy to eliminate pancreatic tumors in animal models. Very relevant news because of how deadly pancreatic cancer is and how it affects our society, but now this euphoria has hit a wall after the decision of the US National Academy of Sciences to remove the item from PNAS magazine. The context. The original article, published on December 2 of last year, was not just another publication, but described the results of administering three drugs in 45 mice who had pancreatic cancer. And although it was a preclinical study that had not been tested in humans and was the expected next step, it generated great expectation. The promise of a cure, even if it was in the animal phase, propelled intense fundraising campaigns to be able to start a clinical trial with humans as soon as possible. In this way, foundations such as CRIS against cancer achieved raise 3.7 million euros in the heat of these advances and thanks to the media showcase that was given to them. And now they withdraw it. The first thing to keep in mind when faced with so many alarmist headlines is that it is not removed from the PNAS magazine because the results have been invented or exaggerated, but rather the reason lies in the omission of important information regarding to conflict of interest. In this case Mariano Barbacid, taking advantage of his status as a member of the National Academy of Sciences of the United States, used a “fast track” of publication that is reserved for academics of this institution. The problem is that this privilege requires scrupulous and impeccable transparency. Data omission. As detailed by El Paísthe alarms went off in February 2026, when the academy received notices about possible conflicts of interest that have now led to the sudden retraction of the article. The problem is that Mariano Barbacid, along with researchers Carmen Guerra and Vasiliki Liaki, are co-owners of Vega Oncotargetsa spin-off which was born in the ecosystem of the National Cancer Research Center (CNIO) with the aim of developing and marketing therapies against pancreatic cancer like this one. This is why informing the journal that the authors had a direct economic and business interest in the success of the study is a violation of the most basic transparency regulations in scientific publication. It always happens. When a researcher wants to publish the results of his or her research, a lot of data must always be provided, both about the method that has been followed and everything behind it, such as the source of financing or the conflicts behind. For example, if a researcher owns shares of a large pharmaceutical company and studies one of its drugs, logically good results will benefit him because the value of the company will increase. And this is something that should always be reported so that anyone reading the research knows if the researcher may have been influenced by an economic component. And in this particular case, the fact that there is already a company that will commercialize the future therapy that is being investigated is logically something that must always be specified, because if the study goes well, it logically benefits the company enormously. There are already answers. As we say, PNAS sanctions bad practice when it comes to being transparent, but in no case does it indicate that the research is poorly done. Along these lines, Carmen Guerra has already admitted the error, as El País points out, and has confirmed that the team has resubmitted the article with this correction, detailing that they do have participation in Vega Oncatargerts. The problem is that now they are going to have to go through the entire standard review process and the republishing will not be fast. Images | UPV brgfx on Freepik In Xataka | Mice today, hope tomorrow: researchers have managed to attack pancreatic cancer before it forms

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