believes

The extinction of Neanderthals has always been a mystery. Science now believes that they are still with us

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For decades, the disappearance of Neanderthals has been one of the biggest mysteries of human evolution. It happened about 40,000 years ago, suspiciously coincident with our species Homo sapiens to Eurasia… But now we are thinking that they did not become extinct. What was thought. Classical theories paint a replacement scenario: either we wiped them out in direct competition, or they couldn’t withstand brutal climate change. But now a study published in Scientific Reports offers a much more fascinating answer: we absorb them among ourselves. And the key to all this is genetic dilution. The hypotheses. To go deeper, the competition hypothesis suggests that Homo sapiens We were simply superior: we had better hunting strategies, a broader diet or more advanced social structures that allowed us to monopolize all the resources, driving the Neanderthals to extinction. On the other hand, the environmental hypothesis blames the drastic climate changes that occurred just at that time. According to this idea, Neanderthals could not adapt to extreme fluctuations and their populations fragmented until they disappeared permanently. However, the new study presents a mathematical model that leaves both factors aside and focuses on the most basic of all: demographics and sex. The new model. The authors of the study propose an analytical model that demonstrates how Neanderthals could disappear without the need for the Homo sapiens had any selective advantage over them. The model does not require “catastrophic events” or cognitive superiority. Instead, it relies on a concept called “species-neutral drift” and a key factor: small, recurring immigrations of Homo sapiens in Neanderthal territories. There were many more of us. One of the first ideas pointed out in this case is that the population Homo sapiens that left Africa was much larger in number than the Neanderthal, acting as a “practically infinite demographic reservoir.” By going together, because friction makes affection, and between the species they began to intersect and had very fertile offspring. The model assumes that this was not a one-time event, but rather a “sustained gene flow” that occurred every time a small group of modern humans arrived in an area. So, adding that the Neanderthal population was much smaller and there was a constant influx of genes from Homo sapiensthe result is the dissolution of the gene pool. It’s literally like pouring a glass of Neanderthal water into an ocean of Homo sapiens. In the end his presence is completely diluted. The time. The most powerful thing about the study is that its calculations fit with the archaeological record. The mathematical model shows that this process of “almost complete genetic replacement” could have occurred within a period of 10,000 to 30,000 years, something that aligns with the long period of coexistence that both species had in Eurasia. Were they extinct? This is the question we ask ourselves. Know if the word ‘extinction’ is appropriate for this paradigm. This model offers what scientists call a “parsimonious explanation” (the simplest). In words we understand, it does not deny that other factors, such as competition or weather, could have contributed. But it shows that this genetic dissolution alone is something that may have explained the disappearance of the Neanderthals. That is why, rather than an extinction, we speak of a fusion by absorption. This perfectly explains why the Neanderthals disappeared as a genetically distinct group, but their legacy endures: modern humans of Eurasian ancestry conserve in our DNA a small percentage of their genetic heritage (although very diluted). Images | mostafa meraji In Xataka | Human evolution has not stopped: in fact, there are reasons to think that it is more accelerated than ever

More and more children suffer from it and science believes it knows why

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For years, the hypertension has earned the nickname the “silent killer“. It is a pathology that barely causes symptoms, but can cause serious damage in the heart, brain and blood vessels. Traditionally, it has been associated with older people, whose arteries age and accumulate atheromatous plaques over time. But that is changing: More and more children are living with high blood pressure. Taking blood pressure in the little ones in the house is something that for many may be unthinkable, because it is something that is logically assumed to be perfect because their arteries are also very young. But it’s changing, according to a study published in The Lancet Child & Adolescent Health. How many. The data are worrying: the percentage of children and adolescents with hypertension has almost doubled in two decades: from 3.2% in 2000 to more than 6.2% in 2020. This means that 114 million children under 19 years of age in the world today live with high blood pressure. This photograph results from an analysis of 96 different studies and 443,000 young people from 21 countries. The reasons. So… Why on earth does a child have a disease that is associated with older people? The person responsible is in obesity which is associated with an almost eight-fold increased risk of developing high blood pressure compared to their peers with a healthy weight. And the figures in this case are devastating. To give us an idea, among children who have a healthy weight, only 2.4% have hypertension. But this counteracts with children who do have obesity, where the figure shoots up to 19%. This is further amplified when childhood obesity is increasing globally and has tripled since 2000 as has recognized UNICEF. And the causes in this case seem to be in the high consumption of processed foods and also in the low physical activity that some young people have. Diagnose in time. Although the study recognizes the limitations that arise in the differences in measuring blood pressure, the message is quite clear: blood pressure must be taken when risk factors such as obesity are present. We must remember that we are talking about a ‘silent killer’, because it seems that everything is correct, but damage to the arteries is occurring. The most important thing, like any other disease, always is early diagnosis to be able to apply measures to control the situation and prevent it from advancing much further. The problem of measurement. One of the most revealing findings of the study is that How we measure blood pressure matters, a lot. Prevalence figures change drastically depending on the diagnostic method. A priori, the diagnosis in a medical consultation requires at least three office visits for hypertension to be confirmed, causing the prevalence to be estimated at 4.3%. However, when the researchers included out-of-office evaluations (like the classic blood pressure monitors that anyone can use), the prevalence of sustained hypertension shot up to 6.7%. It’s a problem. This paradigm shift suggests that there are children who have normal tension when they go to the doctor, but it increases in their daily lives. Something alarming, especially considering that it affects 9.2% of children and adolescents globally and that is why we should not allow this masked hypertension. In the opposite case, blood pressure is elevated in the medical environment due to stress, but is normal at home, something known as ‘white coat hypertension‘. This affects 5.2% of young people, suggesting that a notable proportion could be being misdiagnosed or overtreated. Prehypertension. The study not only looks at children who are already hypertensive, but also at those who are in the waiting room. Data show that an additional 8.2% of children and adolescents have prehypertension, that is, blood pressure levels higher than normal, but do not yet meet the criteria for diagnosis. But this risk is not homogeneous. Prehypertension is especially prevalent during adolescence, reaching 11.8% of adolescentscompared to 7% in younger children. Images | CDC Ben Wicks In Xataka | We have known for a long time that our heart “fixes” itself. Now we know better how

ASML and TSMC are masters of semiconductors. A US startup believes it knows how to end them: with X-rays

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A mysterious American startup called Substrate has made its appearance with a purpose extraordinarily ambitious: compete head to head with ASML. The Dutch company has become the master of the segment of advanced photolithography machines for chip manufacturing, but at Substrate they believe they have the key to turn the tables. Why is it important. ASML has no competition in the market since it placed its first equipment of UVE photolithography. The ASML thing is a monopoly de facto: If a chip manufacturer or designer wants to access to produce the most advanced models, it depends entirely on the Dutch company. No one has managed to stop it since then, and even China, which is trying to free itself from that dependence, it’s really complicated. Substrate. This is the name of this startup that has developed a new team in which use particle acceleration to manage lithography. This technology allows microscopic circuits to be etched onto silicon wafers, and this new company claims that its machines could be in manufacturing plants in the US within the next two years. It all sounds very good. Maybe too much, but they already have funds to try: they have just raised 100 million dollars and among investors There is Peter Thielco-founder of PayPal and current CEO of Palantir. And already, they will try to help create the new TSMC. The challenge is enormous: ASML has invested decades and billions of dollars to perfect its photolithographic equipment, and the complexity of this market makes it very difficult for companies created from scratch to compete. Substrate’s objective is twofold, because it also aims to ensure that its machines enable the affordable chip manufacturing in the US. Or what is the same: it not only wants to compete directly with ASML, but also allow American manufacturers to compete with TSMC on American soil. There it is nothing. Light is everything. When creating those circuits, some of the lines created are so fine that their dimensions are even thinner than the wavelength of light. To solve that ASML problem they do use of extreme ultraviolet light (EUV) through a very complex set of lenses and mirrors. These machines generate a type of artificial light that is capable of engraving those very fine lines on advanced chips. Very special X-rays. In Substrate they propose a different idea. Although they do not give all the details to prevent someone from copying them, their machines use X-ray lithography (LRX). A particle accelerator creates a light source from x-rays with a shorter wavelength, allowing the beam to be used to create advanced chips. Current Substrate machines are currently capable of working with 12 nanometer nodes, comparable to ASML High NA EUV machines: That would put them on par with the most advanced chip production lines in the world. LRX technology is not new. This technique has existed since the 1970s, but had been abandoned because longer wave techniques (UVP and UVE) continued to scale without the need to overcome the great technical challenges of RXL. In substrate they seem to have precisely the solution to those problems, which focused on optics and the need to use massive particle accelerators as a light source. And they promise brutal cost savings. At Substrate they maintain that their LRX equipment will have an estimated cost of about 40 million dollars, compared to 400 million for ASML’s High-NA EUV. In addition, there would be another associated revolution: the possibility of carrying out the so-called single exposure patterning at advanced resolutions (2 nm, 1 nm and beyond), thus eliminating the additional costs of the multipatterning (multiple exposures). If that promise is fulfilled, the production cost of advanced wafers would be 50% lower according to Substrate. But. Of course, it’s one thing to say it and another to do it. The precision of the process, they explain in Semianalysisis a monumental obstacle. The transfer of patterns (going “from light to silicon” almost “carving it”) remains problematic, and among the challenges is solving the roughness of the edges of the printed patterns, which is amplified during engraving. There is also the problem of stochastic noise (shot noise, random fluctuations in photons that cause defects) and secondary electron blurring inherent to the high energy of X-rays, which fundamentally limits resolution. There are also currently problems with the 1.6 nm overlay, which is still high for more advanced processes where 1.0 or 1.2 nm are sought. In Xataka | AMD is today a semiconductor giant. In its beginnings it was something much more humble: a blatant copy of Intel

After many years trying to copy the Falcon 9, Elon Musk believes there is a company about to achieve it

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It seems unlikely today that a startup can be 10 years ahead of the competition, but that is the case with SpaceX. Elon Musk’s aerospace company dominates the industry thanks to the Falcon 9, a rocket that has turned 15 years old and has been almost a decade landing vertically without any other orbital rocket having managed to repeat the feat. Until now. The Falcon 9 has company. A few days ago, Elon Musk broke his usual disdain about the rest of the industry to point out a specific contender. The Chinese company Landspace is not only close to matching the Falcon 9, Musk admitted.but it could end up surpassing it. The reason? Its new Zhuque-3 rocket, which combines the general architecture of the Falcon 9 with key elements of Starship, SpaceX’s most modern and experimental rocket. The gigantic Starship “is in another league,” Musk said. However, recognized that the Zhuque-3 could reach “Falcon 9 levels of reliability and launch rate” in about five years. This is the Zhuque-3 rocket. The big bet of LandSpace, one of the private companies most powerful in the Chinese aerospace industryis a two-stage launcher with a first stage capable of landing vertically for reuse. Although it has a very similar power to that of the Falcon 9 (with a payload capacity in its reusable configuration of 18.3 tons), it is built in stainless steel instead of aluminum, and burns methane and liquid oxygen instead of kerosene, the same material and the same fuel as Starship. Landspace is just the first. If Zhuque-3 manages to successfully take off and land in the coming weeks, Landspace will be the first company to close the enormous distance that separates the industry from SpaceX (with permission from Blue Origin’s New Glenn, a larger and heavier rocket, which also hopes to take off and land successfully in November). These two will be followed by other models such as the CZ-12A from the Chinese state company CASC and the Tianlong-3 from the Chinese startup Space Pioneer. Next will come the Hyperbola 3 from iSpace, the Pallas 1 from Galactic Energy and the Gravity 2 from OrienSpace. All Chinese companies, driven by the liberalization of the space industry promoted by Beijing in 2014. Copy what works, then improve. Public incentives, such as very low-interest loans, only tell part of the story. If Chinese companies are on the verge of having their Falcon 9, it is because of their philosophy of first copying what works and then iterating until they improve on their Western rivals. Elon Musk’s recognition is, perhaps, the clearest sign that the race has changed. It’s no longer a question of whether someone will copy the Falcon 9, but rather who will be the first to surpass it using, ironically, SpaceX’s own ideas for its next generation of rockets. In Xataka | The race to become “China’s SpaceX”: who’s who in its private space launch sector

science believes it has an explanation

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Walking down the street and seeing someone walking with their eyes downward can make us instantly think that something is happening to that person emotionally, such as being sad. But the reality is that walking down has many meanings and that have been proven through sciencewhich go far beyond the field of psychology and makes us rethink the thoughts we have when we see someone in this situation. The body language. One of the letters of introduction we have to the world is undoubtedly the gestures we make. It is not the same to be with them all the time. crossed arms which may indicate a more closed attitudeto be much more open in front of another person. And the look is another fundamental letter of introduction that we can understand perfectly. What psychology says. The most widespread interpretation of looking down while walking is attributed to the insecurity, shyness, sadness or low self-esteem. It is a fact that avoiding eye contact can seem evasive and, in a society like ours, is often considered a sign of vulnerability or emotional processing. This is something that has been collected in different studies focused on non-verbal communication where they reinforce this idea: the hunched posture, the gaze towards the ground and the absence of eye contact can indicate internal states such as introspection, emotional stress or the need for protection from the environment. However, the field of psychology warns that this overly simple or ‘generalist’ interpretation is inaccurate. To understand it we can go to other cultures such as the Japanese, where looking at the ground is a sign of respect or modesty, or can even be interpreted as a form of concentration or reflection. In this way, the social context, personality and frequency of the gesture make the difference between a ‘good clinical indication’ and perfectly normal behavior. Neuroscience. But beyond psychology, Neuroscience also has a lot to say in this field to thoroughly study why, in many situations, looking down is a very useful strategy. Studies published in journals such as Nature demonstrate That directing your gaze toward the ground helps adjust your balance and reduces the risk of tripping. Within these studies, brain activity and movement patterns have been specifically measured in people walking in different environments. And the conclusion is quite clear: looking down provides the brain with critical information about the terrain and allows you to adjust your step, especially if there are obstacles or the ground is uneven. In this way, if you go in the middle of the field for example, the normal thing is to look down to avoid tripping or ending up on the ground. The same occurs with a work published in 2021 that observed that this position improves stability in older people and also when the cognitive load increases, for example, when we are distracted. Thus, far from being just an emotional symptom, it is also a rational and functional response. facing physical and mental challenges. Mental health. Should every gesture of looking at the ground worry us? The clinical literature clarifies: if the gesture appears in isolation, it does not imply problems. But if it is combined with other signs such as social isolation, apathy or mood changes, it can be part of a picture of depression, anxiety or stress. The problem is that a simple look down the street is not enough to know this, but you must know that person much more. But the evidence is quite clear in this sense: ​there is a relationship between emotions and posture, but it is never a single indicator. Beyond the myth. In this way, every time we see a person with their gaze downcast, we don’t always have to think about the most negative thing, but we don’t always have to think about the most positive thing either. The reality is that if we are walking down a street Looking at the ground serves to avoid obstacles, process information while walking or adopt multitasking strategies (or even if you are lucky to find a ticket). Images | Caspar Rae In Xataka | The psychology of doomscrolling: the trap our brain is programmed to fall into again and again

Meta still believes in the metaverse, seriously, we’re not joking, he really believes it

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At the end of 2025, the technological landscape is very different from what Meta imagined when it bet its future on metaverse. There are no millions of people with virtual reality headsets at home or meetings that replace the office with a permanent digital environment. The word “metaverse” It doesn’t even figure in most conversations about technology anymore. On the other hand, artificial intelligence has taken over public debate, the economy and the daily lives of users. The focus has shifted, but Meta insists that his vision has not disappeared, it has just changed shape, a little. You may remember when, in 2021, Facebook decided to change its name to Meta. It was not a simple branding, but a declaration of intent: Mark Zuckerberg assured that the future of the internet lay in the metaverse, a space where we could “feel present” even if we were far away. The company presented that vision as the next leap after social networks, a world in which avatars, virtual offices and a new digital economy would coexist daily. The plan sounded ambitious, almost inevitable, and Meta backed it with billions in investment. Meta still believes in the metaverse: this time he wants to take it everywhere, literally The big news is that the Meta metaverse no longer wants to live locked in a helmet. The company has begun to expand Horizon Worlds beyond virtual reality, bringing it to mobile and, little by little, to its own networks. Vishal Shah, vice president of metaverse, He explained it in The Verge: it’s not about doing something just mobile, but about playing and being together cross-platformwith Horizon accessible from headphones and mobile phones, and with integration tests on Facebook and Instagram. Meta seeks to make this 3D social layer accessible to anyone, without the need for specialized hardware, as a natural extension of its existing platforms. The change is not limited to strategy, it also affects technology. Meta has developed a new graphics engine for Horizon Worlds that seeks to offer more stable worlds compatible with mobile, headset or web. In addition, it has incorporated artificial intelligence tools that assist creators in tasks such as generating objects or animating environments. At its Connect conference, the company explained that this system allows “creating five times faster” than before. It is one more step towards the automation of development, with AI as the main ally. The commitment to the metaverse has also forced Meta to rethink its hardware. Quest helmets have gained in lightness, processing and optical quality, but the company recognizes that they are not yet devices designed to be worn all day. Now we are seeing how attention is shifting towards the Meta Ray-Ban Displaywhich include the Meta Neural Band (EMG bracelet) for gesture control. The future of work in the metaverse, according to Meta Meta also wants its metaverse to work beyond its own devices. That is why it launched Horizon OS, the operating system that supports its viewers and that it now offers to third parties. With this, the company seeks to replicate the Android model: a common base on which different brands can build their products. This movement fits with its commitment to interoperability and universal avatars, capable of maintaining the user’s identity regardless of the device. According to Meta, that is the necessary step for the metaverse to be truly open. One of Meta’s great challenges is to turn the metaverse into an economically viable space. To this end, it has launched different monetization initiatives in Horizon Worlds, from the sale of digital goods to incentive programs for creators. His speech is clear: without a functional economy, there will be no metaverse that lasts. Still, Meta insists that the creation tools and technical foundations are already in place for that model to grow over time. Since Facebook became Meta in 2021, the metaverse roadmap has gone through several stages. First came the initial enthusiasm and big promises. Then, in 2022, difficulties surfaced: internal leaks revealed that even employees were barely using Horizon Worlds. In 2023, the company tried to reactivate the project with new helmets and with the aforementioned Horizon OS. Already in 2024, the discourse changed: less bombast and more interoperability. In 2025, Meta talks about “Horizon everywhere”, a more transversal metaverse and less dependent on VR. The big challenge for Meta continues to be adoption. Bringing Horizon to mobile phones and social networks facilitates access, but there is still a need convince users that you are worth their time. The company needs to demonstrate that the metaverse provides something useful and constant, beyond the initial curiosity. Questions also remain about interoperability between platforms and how many people actually use it. Without clear signs of growth, the feeling is that the bet is still alive, but still far from becoming a mass phenomenon. Images | Xataka In Xataka | Three years after the metaverse fiasco, Zuckerberg has another burning nail for Meta: digital glasses

the company believes it has the solution

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Google just launched Gemini Enterprisea comprehensive AI platform designed specifically for businesses. The movement makes sense, since there is a whole barrage of tools based on generative artificial intelligence that have landed in offices, thanks in large part to companies like OpenAI or Anthropic. The first of them already boasts of its 5 million users with the ChatGPT plan for business and Anthropic has already closed agreements with giants like Deloittewhich Claude will deploy to its 500,000 employees worldwide. Google does not want to be left behind in the race to dominate AI, so it is time to see if its platform convinces. Google’s bet. Gemini Enterprise is not another Workspace addition or a cosmetic name change. It is an independent platform under Google Cloud that works as a toolkit for companies to create and deploy their own AI assistants. Google Cloud CEO Thomas Kurian has described as “the new gateway for AI in the workplace.” Image: Google What exactly does it offer?. The platform promises several key tools: access to the latest models Gemini 2.5 Pro and I see 3pre-built Google agents like Deep Research and Data Insights, a no-code workbench for any employee to analyze information and automate processes, and connectivity with business data hosted in Google Workspace, Microsoft 365, Salesforce or SAP. All managed from a centralized framework that allows agents to be audited and secured. The differential factor. While its rivals also offer business solutions, Google prefers to go for more complete integration. According to the companythe platform can connect to both internal systems and more than 100,000 external partners, from Box to Slack to S&P Global. Google ensures that it also includes specialized tools such as data automation and exploration agents, useful for eliminating a multitude of manual processes. Real use cases. Google has announced some clients that already have Gemini Enterprise in their systems, such as Virgin Voyages, who claim to have deployed more than 50 specialized agents on the platform. Clients also include software design firm Figma and installment payment platform Klarna, among others. According to a study McKinsey’s recent report, in certain cases, integrating AI agents into workflows can increase productivity by between 20% and 60%, figures that are certainly attractive for companies. Prices. Gemini Enterprise Standard and Plus, designed for large companies, starts at $30 per user per month in annual plans. For small businesses and startups there is Gemini Business, which costs $21 per month per user and includes a 30-day free trial period. Cover image | Solen Feyissa and Alex Dudar In Xataka | A consulting firm scammed Australia with a report made with AI. The problem is that the AI ​​invented the sources and even the quote from a judge

We had been believing that dark matter existed. A new study believes that we were wrong

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For decades, cosmology has been sustained on a pillar as fundamental as mysterious: The dark matter. The invisible glue that, according to the standard model, keeps galaxies together and prevents the stars from being fired by centrifugal force.Represents 27% of the universebut it has a problem: nobody has seen or detected it. It only trusts that it will be there. But now A published study in Galaxies This conception of the concept has changed. The study. Research led by the physicist Rajendra P. Gupta From the University of Ottawa proposes an idea as elegant as radical: what if dark matter does not really exist? According to his work, this ghost component could actually be an ‘illusion’, a side effect caused by something we were assumed: that the fundamental constants of nature are ‘constant’. The importance. To understand the magnitude of this proposal you must first remember the origin of the problem. Specifically, we have to go to the 70s, where astronomer Vera Rubin noticed that the stars at the edges of the galaxies revolved at the same speed those of the center. This completely challenged Newton’s laws, something that is as if a person sitting on the outer edge spinning at the same speed as a sitting near the axis. Physically, it should be triggered. The solution that the scientific community adopted was the existence of a “dark matter”, an invisible mass that generates the extra gravity necessary to maintain cohesive galaxy. This concept became the cornerstone of the cosmological model known as ΛCDM (Lamda-Cold Dark Matter). This model works incredibly well to explain the large -scale universe, but after searches with ultrasensitive detectors and experiments in the LHC We have not found a single particle of dark matter. It has always ‘detected’ indirectly through its gravitational effect on visible objects. The proposal. This is where Gupta’s idea enters. Its model, called CCC + TL (Covarying Couplening Constants + Tirad Light), is based on two different ideas. The first one is the so -called ‘Covriant coupling constants’ (CCC). In this case, the model suggests that the fundamental constants of physics, such as the speed of light (c) or the universal gravitation constant (G), are not fixed. Instead, they evolve and change as the universe expands. This is not a completely new idea (the physicist Paul Dirac already flirted with her), but Gupta integrates it into a complete cosmological model. The second idea raised in the investigation is that of ‘tired light’. A concept that arrives directly from the old hypothesis of ‘tired light’, which postulates that light loses energy throughout its trip through the cosmos. In this case, the Gupta model suggests that the redness of the light of the distant galaxies is not only due to the expansion of the universe but to a combination of both effects. Although the “tired light” as the only explanation, has been widely refuted, its inclusion in this hybrid model is key to its calculations. New terms. Once these two new ideas are taken into account, it is time to modify Einstein’s field equations with these variable constants, the GUPTA model makes new mathematical terms appear. This is something that the author has baptized as “α-material” and “α-energy.” And this is where it is true magic: these terms, which are not a physical substance but an effect of the evolution of the laws of physics, generate the extra gravitational attraction that until now we attributed to dark matter. Dark matter would not be something to find, but a mathematical mirage. It is tested. Something to keep in mind is that theories can be very well written and look very good on paper, but logically they have to demonstrate. For this, Gupta used the SPARC database, a high quality catalog with the rotation curves of 175 galaxies. The method used was the reverse to the traditional. Instead of adding dark matter to justify rotation curves, Gupta took the curves observed and used its model to “subtract” the effect of “α-material”. The result should be the rotation curve generated only by visible (barionic) matter. Something that has wanted to materialize in a graphic taking as an example the NGC3198 galaxy. In this image, the blue line (VO) is the rotation speed observed in the galaxy. The points line (VB) is the speed that should have if only the visible matter existed, according to the estimates of SPARC and the discontinuous line (VBX) is the prediction of visible matter calculated by the GUPTA model. The similarity between the prediction of its model and the estimation of barionic matter is remarkable. Something that the author repeated for several galaxies with promising results to give a very forceful conclusion. A new paradigm. If the CCC+TL model is correct, its implications are huge. Not only would it eliminate the need for dark matter, but, according to the author, it could also explain dark energy and other cosmological enigmas, such as why the first galaxies Observed by James Webb They seem more mature than they should. You have to be cautious. This is, for now, a “proof of concept” as the author himself points out. This means that it is using simplifications, such as treating galaxies as perfect spheres, something that is far from reality in the universe. In addition, its dependence on “tired light” is a friction point with conventional cosmology. Models such as this should demonstrate that they can explain with the same precision as λCDM Key observations such as microwave background radiation or the accelerated expansion of the universe. A new advance. But what is clear with this research is that the scientific community is exploring alternatives, especially when the predominant model presents fissures, such as the absence of a direct proof of dark matter. The Gupta model is, for now, a fascinating possibility. A reminder that in science, the most entrenched truths can be questioned and that the solution to the greatest mysteries of the universe might not be to find something new, but in … Read more

The Irobot co -founder believes that there is a robotics bubble

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Rodney Brooks believes that humanoid robots are a bubble condemned to explode. Anyone says it: Brooks was the co -founder of Irobot, the company that manufactures the famous robots aspirations of the Roba family. Too nice to be true. This expert, who before Irobot worked for decades at MIT, does not believe that in the future we live surrounded by human robots. Observe skepticism the developments of companies such as Tesla or Figure, who work in robots that learn to move as humans. In a new essay He talks about this type of way of thinking about the future “is pure fantasy.” The bottleneck of skill. In his opinion, the problem is that trying to imitate the skill of movement of a human hand – for example – is an almost impossible mission. Especially since there are 17,000 specialized tactile receptors (and that detect pressure, vibration, texture or sliding) that it is not possible to find in humanoid robots. There is, however, concrete advances in this area. Insufficient training. According to Brooks, “we don’t have that kind of tradition for touch data.” This area is different from what has been achieved with other areas such as language recognition or image processing. In his essay he explains how learning based on visual videos of humans performing tasks are not enough for robots to acquire that skill. An experiment. To reinforce his theory, Brooks commented on how in an experiment a person was anesthetized the fingertips to analyze the skill of his hands. In this experiment it was seen how the person took four times more to complete a simple task such as lighting a match. The touch sensation, says this expert, is irreplaceable. Tree goes. But it also warns of the security risks posed by these robots. Keeping them standing requires a lot of energy, he says, and if they fall they can end up being A real risk. The reason is that as explained by the kinetic energy of its limbs, it is amplified by the Law of Scale. Robots with tweezers. For him the “humanoid robots” of the future will be of everything but humanoids. Instead in 15 years what we will see are robots with wheels, several arms, industrial tweezers and specialized sensors. The huge current investments that technology companies are making will not crystallize in that theoretical mass production of humanoid robots. China does believe in humanoid robots. Brooks’ arguments are powerful, but the truth is that China is demonstrating have an absolute faith in it future of this segment. The current humanoid robots are limited in their benefits and capacity, but the investment in this market and the advances that are being made are undeniable. What will have to be verified is whether that human skill and tactile perception end up in effect insurmountable obstacles for such robots. In Xataka | China has just opened the first megatienda of humanoid robots. What comes later promises even more

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