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A research team from the Faculty of Engineering at the University of Hong Kong (HKU) has successfully used mechanical stretching technology to dynamically control the emission color of gallium nitride (GaN) material from ultraviolet (UV) to blue light. This technological breakthrough provides a new semiconductor material control solution for future advanced power transistors, optoelectronic components, radio frequency components, and micro-LED displays.
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Ashley Gonzalez was fired after HPD officials connected her with videos where she said she used her role as an officer to target Black people
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Alphanso Talley has been charged with murder and attempted murder in the shooting that killed Officer John Bartholomew and severely wounded another officer
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Baldwin Park Police responded after a victim was fatally shot; Officer Samuel Riveros was shot by the suspect during a standoff while working to warn bystanders of the danger
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The bright whites of mountain snow, muted browns of the arid plains, and gem-like blues and teals of glacial lakes typically dominate the Patagonian color palette. But for a short time in the austral autumn, temperate deciduous forests add splashes of warm tones. On April 12, 2026, a break in the clouds allowed the Landsat 9 satellite to capture an image of reddish hillsides in the Magallanes region of southern Chile.
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Researchers have uncovered a counterintuitive phenomenon in collision dynamics: high-speed particles bounce back from wet walls much more strongly than expected. Integrating experimental observations with advanced numerical simulations revealed that increasing the impact speed induces a morphological transition in the post-collision liquid film, shifting it from a bridge to a dome shape. Further, it clarified the relevance of cavitation to such a dramatic change and to the stronger bounce.
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Understanding the universe as a whole requires simulations on cosmic scales. An international team of astrophysicists, with a leading role for researchers at Leiden University, Netherlands, has now released one of the largest cosmological simulation datasets ever produced. The dataset contains more than 2.5 petabytes of simulation data—roughly equivalent to half a million HD movies.
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An international team of astronomers has employed the Atacama Large Millimeter/submillimeter Array (ALMA) to perform high-resolution observations of the Needle galaxy. Results of the new observational campaign, presented April 15 on the arXiv preprint server, provide more insights into the properties of molecular gas in this galaxy.
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From wearable technology to industrial heat recovery, thermoelectric generators which convert waste heat into electricity have an enormous range of potential applications. So far, however, designing high-performing versions of these devices has remained a painstaking task.
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NASA’s Curiosity and Perseverance rovers have captured two 360-degree landscapes that highlight how the missions are revealing details of the red planet’s formation, watery past, and potential for life. Located 2,345 miles (3,775 kilometers) apart from each other on Mars—about the distance from Los Angeles to Washington, D.C.—both rovers are exploring areas that are billions of years old.
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The moon has played a huge role in the development of Earth. It stabilizes the planet, tempers dramatic climate swings, and possibly even provides the tidal heating that might have led to the first life forms. So it’s natural we would want to find a similar Earth/Luna system somewhere else in the cosmos. But astronomers have been searching for one for years at this point to no avail. And a new paper, available on the arXiv preprint server, from Emily Pass and her colleagues at MIT, Harvard, and the University of Chicago describes using the James Webb Space Telescope to track some of the most promising exomoon candidates—only to be foiled by the star they were orbiting.
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Researchers at McGill University have developed a novel device that generates sound-like particles known as phonons at extremely cold temperatures. The technology could be used to create phonon lasers, with possible applications in communications and medical diagnostics.
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Discovered in 2019, the material known as nickelates has intrigued researchers for its potential to become a superconductor at elevated temperatures—a property that could significantly advance such fields as quantum science and energy transmission. However, it’s a very unstable material and difficult to work with. But the lab of Professor Charles Ahn has developed a method that could enhance superconductivity in these materials. The results are published in Nature Communications.
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The sentence came after a three-week trial which ended with a jury acquitting Guy Rivera of first-degree murder, but convicting him of manslaughter, attempted murder and gun charges
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Sticking with the same people might feel safe and comfortable. But a new Northwestern University study suggests it can actually trap new ideas and behaviors inside tight echo chambers. By contrast, the research, published in Communications Physics, shows that when interactions shift away from familiar contacts—and toward new ones—activity can spread more widely.
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