No todos los materiales valiosos brillan ni se guardan en bóvedas. Algunos existen en minas remotas, reactores nucleares o aceleradores de partículas, y su precio depende tanto de su rareza como de lo difícil que resulta producirlos, aislarlos o mantenerlos estables. La antimateria sigue siendo el caso más extremo: CERN recuerda que solo puede producirse y almacenarse en cantidades minúsculas, mientras que el californio-252 se usa como potente fuente de neutrones en aplicaciones nucleares e industriales.

Un ensayo del programa POWER de DARPA logró entregar más de 800 vatios durante 30 segundos a un receptor situado a 8,6 kilómetros del emisor láser. La prueba, realizada en Nuevo México, forma parte de una idea ambiciosa: crear redes capaces de enviar energía a distancia hacia zonas remotas, vehículos, drones o escenarios donde transportar combustible resulta lento, caro o peligroso.

A groundbreaking hospital-based study conducted in India sheds new light on the complex and often controversial relationship between lifestyle factors and prostate cancer risk. Published in the April 28, 2026 issue of Oncoscience, this investigation provides intriguing evidence that certain modifiable habits, specifically coffee and meat consumption, may significantly reduce the likelihood of developing prostate cancer among men. This revelation emerges despite prostate cancer being the world’s second most prevalent malignancy in men and a critical contributor to cancer-related mortality.

The research was spearheaded by Maya Kulshekar and Anuradha B. Patil at the Department of Biochemistry, Jawaharlal Nehru Medical College, part of the KLE Academy of Higher Education and Research in Karnataka, India. Their work comes at a crucial moment when the incidence of prostate cancer in India is poised to rise markedly, underscoring the urgent need to identify interventions grounded in modifiable risk behaviors.

In this rigorously designed study, 72 men with histopathologically confirmed prostate cancer were compared to 132 control individuals diagnosed with benign prostatic hyperplasia (BPH). The investigators carefully examined a suite of lifestyle factors—ranging from tobacco use and alcohol consumption to dietary patterns including tea, coffee, and meat intake, as well as occupational exposure linked to farming. Thorough multivariate logistic regression analyses allowed the team to adjust for confounding variables, thereby refining the associations between these factors and prostate cancer risk.

The findings revealed a striking inverse association between coffee consumption and prostate cancer risk, translating to an approximate 65% reduction in odds after adjustment for potential confounders. Meat consumption similarly demonstrated a protective effect, associated with a roughly 48% decreased risk. These results challenge some conventional nutritional beliefs and highlight the nuanced role diet may play in modulating prostate oncogenesis.

Contrastingly, the study found no statistically significant correlation between alcohol consumption, tobacco chewing, smoking, tea intake, or farming-related occupational exposure and prostate cancer once confounding factors were accounted for. Initial univariate analyses suggested elevated risk linked to smoking and tobacco chewing; however, these associations dissipated under multivariable scrutiny, suggesting the potential influence of other interacting factors.

The biochemical mechanisms underpinning these associations were thoughtfully explored by the authors. Coffee is a complex beverage rich in bioactive compounds including caffeine, cafestol, kahweol, and a spectrum of antioxidant polyphenols. These molecules have been extensively studied for their anti-inflammatory and antioxidant properties, implicating them in pathways that may suppress malignant transformation or tumor progression. Their capacity to modulate cellular stress responses, DNA repair, and immune regulation positions coffee as a potent functional food in cancer prevention paradigms.

Similarly, meat contains constituents such as trans-vaccenic acid, an unsaturated fatty acid that has been observed in some experimental models to influence immune responses and cellular signaling pathways relevant to oncogenesis. Notwithstanding, the study authors caution that the protective role of meat is complicated by the heterogeneity inherent in types of meat, cooking methods, and quantity consumed—parameters that were not stratified in this investigation. The metabolic and molecular consequences of processed versus unprocessed meats or the generation of carcinogenic compounds during certain cooking processes remain pivotal confounders warranting further rigorous examination.

This research importantly acknowledges the broader scientific context where prior epidemiological studies have reported inconsistent and at times contradictory findings regarding coffee, meat, tobacco, tea, and alcohol in relation to prostate cancer risk. This inconsistency may stem from differences in study design, dietary assessment methods, population genetics, and environmental factors across cohorts. The current study’s contribution lies in focusing on an Indian population, thereby addressing a geographic and ethnic gap in the literature.

The methodological design, while robust, is not without limitations. The single-center hospital-based sample, and relatively modest cohort size, may affect the generalizability of the findings. Additionally, potential recall bias in self-reported lifestyle habits and the absence of quantitative dietary intake measures restrict the granularity of exposure assessment. The authors advocate for larger, multicenter, and longitudinal studies with comprehensive dietary and lifestyle quantification to validate and expand upon these preliminary observations.

This investigation marks an important step toward understanding how modifiable lifestyle factors could temper the risk of prostate cancer. By highlighting coffee and meat intake as potentially protective, the study invites a reevaluation of dietary guidelines and preventive oncology strategies within the Indian context and beyond. The mechanistic insights further fuel the search for bioactive compounds that could be leveraged in therapeutic or nutraceutical formulations.

Ultimately, these findings reinforce the imperative for personalized medicine approaches that integrate lifestyle, genetic, and environmental data to optimize cancer prevention and management. They also echo broader calls within the oncological community to pursue open-access, multidisciplinary research that bridges molecular science with public health imperatives.

While the findings demand cautious interpretation, they open an exciting avenue for leveraging everyday dietary choices as part of a comprehensive prostate cancer risk reduction strategy. As prostate cancer incidence is projected to escalate, especially in rapidly modernizing societies, these insights provide a timely beacon for clinicians, researchers, and policy makers alike.

The study’s implications extend beyond prostate cancer, emphasizing a holistic perspective on how complex interplays of diet, lifestyle, and biological mechanisms coalesce to impact carcinogenesis. It epitomizes the potential for traditional epidemiological research, augmented by advanced statistical modeling, to generate actionable knowledge that may ultimately improve patient outcomes on a population scale.

Researchers and clinicians interested in this expanding field are encouraged to follow ongoing and future work from this team and related cohorts worldwide, as the quest to decipher modifiable risk factors of prostate cancer continues to gain precision and impact.

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Subject of Research: People
Article Title: Modifiable risk factors of prostate cancer: Insights from a hospital-based study
News Publication Date: 28-Apr-2026
Web References: https://doi.org/10.18632/oncoscience.657
Image Credits: Copyright © 2026 Kulshekar et al. Creative Commons Attribution License (CC BY 4.0)
Keywords: modifiable risk factors, prostate cancer, awareness, India, molecular mechanism

La mejor forma de encontrar tecnofirmas es buscando las que han sobrevivido durante más tiempo a sus creadores, según afirman en un trabajo de investigación.

Un trabajo publicado analizó bases de datos volcánicas, modelos tomográficos y simulaciones del flujo del manto para rastrear la relación entre grandes erupciones y estructuras profundas de la Tierra. El resultado apunta a que muchas de estas erupciones están vinculadas con plumas del manto que ascienden desde enormes regiones calientes situadas cerca de la base del planeta.

What happens when you give AI coding agents a lab full of robotic arms, some compute resources, and a “generous token budget” for teaching the robots various tasks? The agents can apparently figure out a training regimen that teaches the robots to successfully cut zip ties and even insert GPUs into thin sockets on motherboards.

That glimpse into how AI can act in a fully autonomous way to automate robot training was made possible by a new agent harness framework—software that wraps around AI models to enable their use of various tools while also providing capabilities such as memory, context, constraint, and feedback loops. That agentic harness, called ENPIRE, was developed by robotics researchers at the Nvidia GEAR (Generalist Embodied Agent Research) lab alongside collaborators from Carnegie Mellon University in Pittsburgh and the University of California, Berkeley.

“A part of our NVIDIA GEAR lab now self-improves tirelessly overnight,” wrote Jim Fan, director of AI at NVIDIA, in a LinkedIn post. “We just read the reports in the morning.”

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Un estudio publicado en Nature Geoscience describe pulsos rítmicos de roca caliente ascendiendo desde el manto bajo la región de Afar, en Etiopía. Estos movimientos profundos no parten África de golpe, pero ayudan a estirar y adelgazar la corteza en una de las zonas tectónicas más activas del planeta, donde algún día podría abrirse una nueva cuenca oceánica.

A US filing says Grok was used in military operations tied to Iran, surfacing through an environmental lawsuit over xAI gas turbines.

Researchers at Washington University School of Medicine in St. Louis have made a groundbreaking discovery that could revolutionize the prevention of diarrheal diseases caused by enterotoxigenic Escherichia coli (ETEC) and Shigella. These two bacterial pathogens are responsible for hundreds of millions of infections annually and are leading causes of diarrheal mortality worldwide, particularly among young children. Despite decades of efforts, vaccine development has encountered significant obstacles, primarily due to the extensive strain variability that hampers the identification of universal vaccine targets.

In a recent study published in the Proceedings of the National Academy of Sciences, the WashU team, collaborating with scientists at the University of Missouri and the International Centre for Diarrhoeal Disease Research in Bangladesh, identified a shared vulnerability within these pathogens that could open the door for a combined vaccine platform. This innovative approach hinges on targeting homologous enzymes that these bacteria use to degrade the mucus lining in the human gut, a critical step in establishing infection.

For bacterial pathogens like ETEC and Shigella to cause illness, they first need to overcome the intestinal mucus barrier. This thick layer of mucus serves as a physical and biochemical shield protecting the gut epithelium and regulating the microenvironment by keeping pathogenic entities at bay while preserving the beneficial microbiota. The ability to breach this barrier is a hallmark of pathogenicity, allowing bacteria to access the underlying tissues and deploy additional virulence factors, including enterotoxins that induce diarrhea.

The study’s focal point is a family of mucin-degrading enzymes that facilitate this breaching process. The researchers detail three closely related enzymes—EatA, SepA, and Pic—that are expressed by ETEC, Shigella, and other diarrheal pathogens. EatA, an acronym for “eat away,” is produced by ETEC and was previously identified by Fleckenstein’s laboratory as a critical mucinase targeting the primary structural protein within mucus. SepA and Pic, related enzymes produced by Shigella and some other bacteria, perform analogous roles. Their enzymatic activity effectively dismantles the mucosal barrier, clearing a path for bacterial invasion.

Intriguingly, the antibodies that the team isolated from individuals infected with ETEC or experimentally exposed to the bacteria displayed a functional cross-reactivity. The antibodies not only neutralized EatA but also inhibited SepA and Pic, indicating a conserved epitope region among these mucinases. This neutralization prevents the enzymes from degrading intestinal mucus, thereby blocking the pathogens’ entry into host tissues. The concept of a single antibody interfering with multiple bacterial targets underscores a significant breakthrough in vaccine strategy.

To unravel the structural mechanics behind this immune neutralization, the researchers leveraged cryo-electron microscopy—a state-of-the-art imaging method that preserves biomolecules in near-native states by flash-freezing samples. This technique enabled detailed visualization at atomic resolution, revealing the precise binding site of the neutralizing antibodies. Remarkably, the site of interaction was a structurally conserved region across EatA, SepA, and Pic, providing a rational basis for the design of vaccine antigens that elicit broadly neutralizing antibodies.

“The identification of this shared Achilles’ heel among diverse diarrhea-causing bacteria signifies a paradigm shift in vaccine development,” explains James M. Fleckenstein, MD, co-senior author of the study and professor of medicine at WashU. “It suggests we can target a common mechanism of gut colonization rather than chasing highly variable surface molecules, which has been the stumbling block in the field for so long.”

Further bolstering the translational potential of these findings, epidemiological data from children in Dhaka, Bangladesh, indicate that naturally acquired antibodies against EatA correlate with protection from diarrheal illness. This natural immunity validates EatA as a viable immunological target and encourages the pursuit of vaccines that induce similar protective responses.

The implications extend beyond the developing world, as enterotoxigenic E. coli has been implicated in recent foodborne outbreaks in industrialized countries such as the United States. The difficulty in distinguishing pathogenic ETEC from non-pathogenic strains in clinical settings further complicates diagnosis and containment. Moreover, reliance on antibiotics to treat infections caused by these bacteria accelerates the evolution of antibiotic resistance, posing a global public health threat.

Zachary Berndsen, PhD, assistant professor of biochemistry at the University of Missouri and co-senior author, emphasizes the rational approach to vaccine design enabled by these insights. “By pinpointing enzyme domains targeted by neutralizing antibodies, we provide a template for crafting precise immunogens that can stimulate protective immunity across multiple pathogens. This can streamline the production of vaccines that are both effective and broad-spectrum,” Berndsen says.

Development of such a vaccine could not only reduce the global burden of diarrheal diseases but also mitigate the spread of antibiotic resistance by decreasing the frequency of bacterial infections requiring treatment. Additionally, preserving the gut microbiota through targeted disruption of pathogenic mechanisms may alleviate some adverse consequences associated with broad-spectrum antibiotic use.

Going forward, the research team is focused on translating their molecular discoveries into practical vaccine candidates. This involves preclinical testing of immunogens incorporating the conserved epitopes identified, assessing their immunogenicity and protective efficacy in animal models, and progressing toward human clinical trials.

“In our ongoing battle with enteric pathogens that have coevolved with humans for millennia, blocking the enzymatic opening of the mucus gate represents a promising strategy,” Fleckenstein concludes. “If successful, this vaccine would preempt infection at its earliest and most vulnerable stage, changing the trajectory of diarrheal disease worldwide.”

The study was supported by grants from the National Institute of Allergy and Infectious Diseases and the Department of Veterans Affairs. The multidisciplinary collaboration brings together expertise in infectious diseases, structural biology, immunology, and clinical research, underscoring the necessity of integrated approaches to tackle complex global health challenges.

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Subject of Research: Human tissue samples

Article Title: Human enterotoxigenic Escherichia coli (ETEC) infections elicit antibodies that broadly neutralize mucinases of pathogenic Escherichia coli and Shigella

News Publication Date: 15-Jun-2026

References:
Buckley DP, Akhtar M, Thapa M, Schmitz A, Turner J, Vickers TJ, Khatoon N, Kaisar MH, Coggin JA, Ganguli D, Sheikh A, Laird RM, Poly F, Porter CK, Ruiz-Perez F, Miller MJ, Chowdhury F, Bhuiyan TR, Qadri F, Trillo-Muyo S, Dolan B, van der Post S, Ellebedy A, Berndsen ZT, Fleckenstein JM. Human enterotoxigenic Escherichia coli (ETEC) infections elicit antibodies that broadly neutralize mucinases of pathogenic Escherichia coli and Shigella. PNAS. June 15, 2026.

Image Credits: David Hasty

Keywords: Infectious diseases, Microbial infections, Diarrhea

Dos meteoritos hallados en el Sahara, Ksar Ghilane 022 y Northwest Africa 15915, muestran una composición mineral con parecidos llamativos a la corteza de Mercurio. El problema es que también presentan diferencias importantes, por lo que los científicos aún no pueden confirmar su origen. Si alguna vez se demuestra la conexión, serían las primeras muestras conocidas del planeta más difícil de estudiar desde la Tierra.

Pedro Rocha avalia as várias abordagens das empresas na procura de um modelo de IA, assumindo que não há soluções perfeitas e que o futuro passa por uma stack, com ecossistemas modulares.

The post Um modelo não vos vai salvar: como se constrói realmente uma stack de IA appeared first on Tek Notícias.

Social media feeds are becoming more customizable as platforms like Threads, Instagram, and TikTok introduce tools that let users directly influence the algorithms powering their recommendations.

Las infecciones con Vibrio vulnificus son raras, pero a medida que pasa el tiempo son más comunes.

No siempre hace falta ver una nube negra para estar ante un problema ambiental. Parte de la contaminación que sale de chimeneas, motores e industrias vuelve a la superficie en forma de lluvia, niebla o partículas secas. Ese proceso, conocido como deposición atmosférica, altera el agua, acidifica suelos, daña ecosistemas y deja marcas incluso en edificios y monumentos.

O Copilot Cowork, que passa a estar disponível a nível internacional, é um agente de IA que promete tratar do trabalho real e ajudar na produtividade. Tarefas que levavam dias a concluir passam agora a ser finalizadas numa manhã, afirma a Microsoft.

The post Microsoft quer abrir a porta à era dos agentes de IA autónomos no trabalho com o Copilot Cowork appeared first on Tek Notícias.

A math whiz as a young man, he later blazed trails, both with his theoretical advances and his advocacy for minority students.

Un estudio publicado en Nature Materials presenta una nueva técnica de microscopía capaz de visualizar propiedades magnéticas dentro de un sólido con resolución atómica. El avance permite estudiar cómo varían el espín y el movimiento orbital de los electrones en un cristal, una puerta clave para mejorar materiales magnéticos, almacenamiento de datos y tecnologías de espintrónica.

Christina Koch acaba de recibir el Premio Princesa de Asturias de la Concordia 2026 en un momento especialmente simbólico para la exploración espacial. La astronauta de Artemis II se convirtió en un referente para miles de niñas, justo cuando la NASA recibe críticas por una nueva misión lunar sin presencia femenina.

La mayoría de las personas usa la inteligencia artificial de la forma más básica: hace una pregunta, recibe una respuesta y se queda con eso. Pero los expertos suelen ir un paso más allá. Encadenar modelos o prompts permite que una IA genere, otra critique y una tercera mejore el resultado final.

A groundbreaking study from UCLA Health introduces a pioneering approach to understanding anorexia nervosa, a complex psychiatric disorder notorious for its high relapse rates and elevated mortality. Researchers employed an ingestible, vibrating capsule to probe the nuanced ways in which the nervous system of individuals with anorexia nervosa processes bodily sensations originating from the gastrointestinal tract. This innovative technology not only illuminates the enigmatic interplay between gut sensations and brain function but also offers promising predictive capabilities regarding relapse risk, potentially transforming clinical management of the disorder.

Anorexia nervosa is marked by a persistent restriction of energy intake, an intense fear of weight gain, and a distorted body image, resulting in dangerously low body weight. Despite state-of-the-art treatments aimed at restoring healthy body weight, relapse rates remain alarmingly high—up to 50% within a year post-treatment. Suicidal behavior is also a significant concern, often cited as the leading cause of death among afflicted individuals. This desperate clinical landscape underscores the urgent need for objective biomarkers and more profound mechanistic insights to improve therapeutic outcomes.

The inadequacy of current understanding centers around a crucial chasm: while physicians focus on weight normalization, many patients continue to suffer from entrenched symptoms that drive relapse, suggesting that the disorder’s etiology extends beyond mere weight regulation. The nervous system’s interpretation and integration of visceral signals, especially from the gut, could hold the key to these persistent challenges. Yet, before this study, precise tools to quantify and manipulate these signals in vivo remained elusive.

The UCLA research team harnessed a clinical trial design involving an ingestible vibrating capsule capable of delivering controlled, gentle mechanical stimuli to the stomach. This non-invasive method allowed for real-time interrogation of gastrointestinal interoception—the brain’s perception and processing of internal bodily sensations. By remotely activating the capsule, the researchers could produce varying intensities of stomach vibrations, simulating subtle gut sensations that are typically difficult to access or measure reliably.

In the study, 62 female patients who had been hospitalized for anorexia nervosa and whose body weight had been restored to clinical norms, were compared against 57 healthy controls. Participants swallowed the vibrating capsule and were instructed to indicate, via button press, whenever they perceived a vibration. Concurrent physiological monitoring tracked brain activity through neuroimaging techniques, cardiac rhythms, and stomach motility, providing a multidimensional understanding of the gut-brain axis in real time. Self-reported metrics on hunger and bodily awareness further enriched the dataset.

Employing sophisticated computational modeling, the researchers analyzed participants’ ability to detect and interpret the gastric signals. These models were designed to estimate participants’ expectation of gut sensations, their reliance on incoming sensory signals, and their adaptability in updating these expectations when signals fluctuated. This approach transcended simple sensory detection, probing fundamental cognitive processes involved in interoceptive learning and prediction error correction.

The results revealed a striking divergence between anorexia nervosa patients and healthy controls. Those with the disorder exhibited diminished accuracy in sensing subtle stomach vibrations, often unaware that a stimulus was occurring even when the capsule was active. They demonstrated a cognitive bias towards expecting an absence of gut sensations and were significantly slower to revise these expectations in the presence of confirmed visceral signals. This implies an altered central processing mechanism rather than a peripheral sensory deficit, reflecting a disconnection or miscommunication within the gut-brain axis.

Crucially, these interoceptive abnormalities persisted despite the restoration of healthy body weight, challenging the conventional clinical assumption that weight normalization is tantamount to recovery. The findings suggest that long-lasting neurobiological alterations in interoceptive processing may underlie the stubborn persistence of anorexic behaviors and cognitions, thus offering a plausible explanation for the high relapse propensity witnessed in clinical practice.

Linking these mechanistic insights to clinical outcomes, the study reported a robust association between impaired gastric signal detection and relapse risk during a six-month post-discharge follow-up period. Patients whose nervous systems exhibited the greatest bias towards ignoring bodily signals were significantly more likely to experience a relapse. This highlights the potential clinical utility of the vibrating capsule as a predictive tool, enabling healthcare providers to stratify relapse risk and tailor interventions accordingly.

From a translational perspective, the use of this ingestible technology marks a seminal advance in biomarker discovery for anorexia nervosa. It opens new avenues for personalized medicine where objective physiological metrics, rather than solely subjective symptom reports, guide therapeutic decisions. Moreover, it positions gastrointestinal interoception as a critical target for future treatment strategies, including neuromodulation, pharmacotherapy, and cognitive retraining designed to recalibrate gut-brain communication pathways.

Nevertheless, the authors caution that these findings currently pertain to a relatively homogeneous sample, primarily young female patients, and must be validated across larger and more diverse populations to confirm generalizability. Future research should also explore how different treatment modalities influence interoceptive processing and whether modulation of this axis can directly mitigate relapse risks.

In conclusion, this UCLA-led study redefines our understanding of anorexia nervosa by exposing the subtle but profound alterations in gastrointestinal interoception that endure beyond weight restoration and presage relapse. It suggests that true recovery necessitates healing not only the body but the fundamental neural processes that govern the perception and integration of internal bodily states. This insight sets the stage for an era where interoceptive biomarkers and bioelectronic medicine intersect to revolutionize the management of this devastating disorder.

Subject of Research: Gastrointestinal interoception and relapse prediction in anorexia nervosa
Article Title: Altered Gastrointestinal Interoception in Anorexia Nervosa Predicts Relapse
News Publication Date: 17-Jun-2026
Web References: http://dx.doi.org/10.1001/jamapsychiatry.2026.1301
References: Published in JAMA Psychiatry, 2026
Keywords: Anorexia nervosa, gastrointestinal interoception, relapse prediction, gut-brain axis, ingestible vibrating capsule, psychiatric biomarkers, neurobiology of eating disorders