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Phys.org es un agregador de noticias científicas y el sitio insignia de la red Science X (junto con Medical Xpress y Tech Xplore), fundada en 2004. Science X es propiedad de Omicron Technology Limited, una compañía privada con sede en Douglas, Isla de Man. Es una editorial comercial privada sin propietario estatal, partidario o de la iglesia.

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Ultrafast scanning tunneling microscopy reaches the quantum mechanical space-time limit for the first time
United Kingdom🔬 Ciencia
hace 10 h

Ultrafast scanning tunneling microscopy reaches the quantum mechanical space-time limit for the first time

Researchers have achieved a breakthrough in observing the 'space-time limit' for electrons, where the simultaneous measurement of their location and time evolution becomes fundamentally limited by quantum mechanics. This discovery, made by teams from the Regensburg Center for Ultrafast Nanoscopy (RUN) and the Max Planck Institute in Hamburg, could impact future technologies like quantum computing and high-performance electronics. They used ultrafast scanning tunneling microscopy combined with advanced laser systems to track electron movement on attosecond time scales, revealing behaviors governed by quantum principles rather than classical mechanics.

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Study reveals systemic barriers slowing down circular plastics transition
United Kingdom🏛️ Política
hace 10 h

Study reveals systemic barriers slowing down circular plastics transition

A study from the University of Eastern Finland identifies systemic barriers hindering the transition to a circular plastics economy. Researchers highlight that factors like regulation, technology, market structures, consumer behavior, and collaboration create interconnected but conflicting dynamics that limit progress. The study introduces the 'recycling for nothing paradox,' noting that despite substantial investment in recycling and sustainability efforts, misalignments across the ecosystem reduce their effectiveness. The findings emphasize the need to address contradictions within the system rather than focusing on isolated solutions. The research, published in the Journal of Circular Economy, aims to inform companies, policymakers, and researchers working on sustainable plastics systems.

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El calor opresivo de los EE.UU. durante la Copa del Mundo, 4 de julio
United Kingdom🏛️ Política
hace 10 h

El calor opresivo de los EE.UU. durante la Copa del Mundo, 4 de julio

Una ola de calor intensa se extendió por los Estados Unidos a principios de julio de 2026, afectando a millones de personas y creando condiciones peligrosas, particularmente en la costa este. El evento coincidió con la celebración de la Copa del Mundo y la preparación para conmemorar su 250o Día de la Independencia. Las condiciones de cúpula de calor atraparon aire caliente en gran parte del país, lo que llevó a alertas de calor generalizadas y llevó a las autoridades locales a abrir centros de enfriamiento y ampliar los servicios públicos. La situación generó preocupaciones sobre la creciente frecuencia e intensidad de las olas de calor vinculadas al cambio climático, y los expertos notaron que la temperatura global aumenta debido a la actividad humana. Mientras que algunos residentes se adaptaron al calor, otros lucharon con la combinación de temperaturas extremas y humedad, destacando los crecientes desafíos planteados por los patrones climáticos.

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There may be 3 times more insect species than previously thought
United Kingdom🔬 Ciencia
hace 10 h

There may be 3 times more insect species than previously thought

A recent scientific study suggests that the global number of insect species could be significantly higher than previously believed, estimating between 8 million to 14 million additional species that remain undiscovered. Current estimates suggest around 6 million known insect species, but this research uses genetic data from over 1.6 million tropical insects, particularly focusing on parasitoid wasps in Costa Rica, along with statistical models, to propose a much larger figure of up to 20 million insect species. This finding highlights the vast underestimation of insect diversity and emphasizes the importance of understanding biodiversity to effectively conserve it. Researchers note that insects' high diversity stems from factors like metamorphosis and their ability to thrive in varied environments. The study was conducted using extensive sampling in Costa Rica’s ACG protected area, employing techniques such as Malaise traps and DNA barcoding to catalog species.

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En el Pacífico tropical se han producido condiciones de El Niño, según los investigadores
World🏛️ Política
hace 10 h

En el Pacífico tropical se han producido condiciones de El Niño, según los investigadores

El artículo informa que los investigadores de la organización de Ciencias de la Tierra de Nueva Zelanda (ESNZ) han identificado condiciones consistentes con el fenómeno climático de El Niño en el Pacífico tropical. Advierten que es probable que los impactos en el clima de Nueva Zelanda se intensifiquen en los próximos meses. El ESNZ se unió a otras organizaciones en Australia, Japón y los Estados Unidos para confirmar el desarrollo de El Niño, que se espera que alcance una fuerte intensidad entre julio y septiembre. Los efectos se proyectan para alcanzar su punto máximo durante el verano del hemisferio sur, que abarca desde finales de 2023 hasta principios de 2024. Según el investigador principal Chris Brandolini, este evento de El Niño es al menos comparable en fuerza a cinco de los El Niños más fuertes registrados en la historia moderna. El artículo describe las expectativas regionales de lluvias, señalando la posibilidad de precipitación por debajo del promedio en algunas áreas y por encima de los niveles normales en otras.

1 izquierda19 centro0 derecha
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Researchers recreate a lost Ming Dynasty goldworking technique to make replica royal jewelry
United Kingdom🎭 Cultura
hace 10 h

Researchers recreate a lost Ming Dynasty goldworking technique to make replica royal jewelry

Researchers from the China University of Geosciences successfully recreated a lost Ming Dynasty goldworking technique called Jin zhe si, which allows for the creation of intricate filigree-like patterns without using wire. By studying gold earrings found in the tomb of Prince Zhu Zairong, they discovered that the technique involved folding thin gold foil into layered, corrugated structures. Using historical records and microscopic analysis, the team reverse-engineered the process and created a replica that closely matched the original in form, texture, and weight. They tested the method with silver and aluminum, but only high-purity gold could be folded repeatedly without breaking, highlighting the unique properties required for this ancient technique.

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Tax-avoiding firms more likely to greenwash, analysis of 391 ASX companies suggests
United Kingdom🏛️ Política
hace 10 h

Tax-avoiding firms more likely to greenwash, analysis of 391 ASX companies suggests

A study conducted by Murdoch University and published in Business Strategy & Development analyzed 391 Australian Securities Exchange-listed companies between 2019 and 2022. The research found a correlation between aggressive tax avoidance and 'greenwashing'—where companies exaggerate their environmental responsibilities. Lead researcher Dr. Augustine Donkor noted that during economic uncertainty, such as the COVID-19 pandemic, companies may prioritize image management over genuine sustainability efforts. The study also revealed that companies employing a 'defender' business strategy, typically focused on stability and cost control, were more likely to engage in greenwashing when they perceive it as a low-cost reputational tool. The findings emphasize the need for improved transparency and stricter oversight of both sustainability reports and corporate tax practices.

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Hot Jupiter winds reveal exoplanet magnetic fields for first time
United Kingdom🔬 Ciencia
hace 11 h

Hot Jupiter winds reveal exoplanet magnetic fields for first time

Astronomers have discovered magnetic fields on 'hot Jupiters,' a type of exoplanet with extremely high surface temperatures, marking the first direct evidence of such fields beyond our solar system. Using telescopes like the European Southern Observatory's Very Large Telescope in Chile, researchers observed extreme wind patterns on these gas giants, which range from 7,200 to 25,000 km/h. Surprisingly, hotter planets exhibited weaker winds, suggesting the presence of magnetic fields that slow charged particles. The findings, published in Nature Astronomy, indicate that these exoplanets possess magnetic fields comparable in strength to those of Jupiter and Earth, offering new insights into planetary atmospheres and potential habitability.

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Una galaxia ultra débil descubierta cerca de Andrómeda podría tener 12.500 millones de años
United Kingdom🔬 Ciencia
hace 11 h

Una galaxia ultra débil descubierta cerca de Andrómeda podría tener 12.500 millones de años

Los astrónomos han descubierto una nueva galaxia enana ultra débil llamada And XXXVI cerca de la galaxia de Andrómeda (M31), que es el vecino galáctico más cercano de la Vía Láctea. El estudio, publicado en Astronomy & Astrophysics, sugiere que And XXXVI es uno de los satélites más débiles conocidos de Andrómeda y podría tener casi 12.500 millones de años. Se cree que las galaxias enanas ultra débiles son restos del universo temprano y están dominadas por materia oscura, lo que las hace cruciales para comprender la formación de galaxias y probar teorías de materia oscura. Los investigadores señalan que, si bien se conocen más de 40 galaxias enanas en órbita de Andrómeda, solo unas 15 se clasifican como ultra débiles, lo que implica que puede haber muchas más por descubrir. Se necesitan observaciones adicionales utilizando telescopios espaciales como el Hubble para confirmar detalles como la distancia precisa, la edad y la composición química de la galaxia.

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Narrow time windows shaped passage for salmon, trout and lamprey at Haringvliet sluices, 18-year analysis shows
United Kingdom🏛️ Política
hace 11 h

Narrow time windows shaped passage for salmon, trout and lamprey at Haringvliet sluices, 18-year analysis shows

A study published in Movement Ecology analyzed the migration patterns of Atlantic salmon, sea trout, and sea lamprey through the Haringvliet Sluices using data from 1,751 tagged fish collected between 1996 and 2018. The research revealed that less than one-third of migratory fish successfully entered the Rhine-Meuse delta, with most passing through the sluices during specific time windows, particularly toward the end of discharge periods when water levels and flow velocities were more favorable. The study also noted differences in passage behavior among species, with Atlantic salmon showing high selectivity for specific conditions and timing, while sea trout exhibited greater variability. Some fish bypassed the Haringvliet Sluices entirely by using the Port of Rotterdam as an alternative route.

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JWST discovers a new barred spiral galaxy
United Kingdom🔬 Ciencia
hace 11 h

JWST discovers a new barred spiral galaxy

Astronomers have discovered a new barred spiral galaxy named M1149-BSG-z5 using the James Webb Space Telescope (JWST). The galaxy, located at a redshift of 5.1, is notable for hosting a stellar bar measuring approximately 14,700 light-years in length, making it the highest-redshift barred galaxy identified to date. It has an effective radius of about 8,500 light-years, with spiral arms extending up to 17,900 light-years. The galaxy's mass is estimated at 28 billion solar masses, and it exhibits a star-formation rate of 144 solar masses per year. Additionally, M1149-BSG-z5 hosts an active galactic nucleus (AGN) with a relatively low black-hole-to-stellar mass ratio, suggesting it may represent a transitional phase in galaxy evolution. The findings were published on the preprint server arXiv.

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Third UK heatwave increasingly likely as 30C temperatures forecast
United Kingdom🏛️ Política
hace 11 h

Third UK heatwave increasingly likely as 30C temperatures forecast

An upcoming heatwave in the UK is being predicted, with temperatures potentially reaching 30°C in parts of the southeast by the weekend. The Met Office reports that June 2026 was the warmest June on record for England and the second warmest for the UK overall. A high-pressure system from the Azores is moving toward the Iberian Peninsula, contributing to rising temperatures. While the UK typically declares a heatwave when temperatures meet specific regional thresholds—such as three consecutive days of 28°C in London and the southeast—the current conditions suggest the heatwave might begin earlier than usual. The UK Health Security Agency has issued heat health alerts for several regions, cautioning about risks to vulnerable individuals. Although the air is expected to be less humid compared to previous heatwaves, the potential for discomfort remains. Northern areas are unlikely to experience heatwave-level temperatures soon due to the influence of Atlantic air and possible rainfall.

2 izquierda23 centro0 derecha
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Study demonstrates neurotransmitter communication in immune cells directly for the first time
United Kingdom🔬 Ciencia
hace 11 h

Study demonstrates neurotransmitter communication in immune cells directly for the first time

Researchers from the University of Münster and Ruhr University Bochum have discovered that neutrophils, a type of white blood cell, use catecholamines—such as dopamine and adrenaline—to communicate in real time, similar to how nerve cells function. Using fluorescent carbon nanotube sensors, they observed that neutrophils absorb, store, and release these neurotransmitters in response to inflammation. This finding reveals a previously unknown connection between the immune system and the nervous system, showing that catecholamines regulate both immune responses and blood clotting. The study suggests that this mechanism is active in humans, based on experiments involving healthy volunteers. The research was published in the journal Advanced Science.

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