All chemistry starts with a push from electrons. In the early moments of a chemical reaction, it’s the movement of electrons that initiates the breaking of old chemical bonds and forging of new ones, transforming one molecule into another.
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All chemistry starts with a push from electrons. In the early moments of a chemical reaction, it’s the movement of electrons that initiates the breaking of old chemical bonds and forging of new ones, transforming one molecule into another.
In early 2025, special signals wended their way through a fiber-optic highway strung above the streets and sidewalks of the Maryland suburbs. The arrival of those signals at their destination marks a significant step toward a long-held dream of building a “quantum network.” Researchers believe that this emerging technology could someday link quantum devices in ways that supercharge scientific research, enable ultrasecure communications and boost the power of future quantum computers.
Black holes are fascinating regions in space where gravity is so strong that nothing, even light, can escape them. The largest known black holes, called supermassive black holes, contain millions to billions of times the mass of the sun and are typically located at the centers of galaxies.
Lasers have become indispensable in everyday life and research, with applications ranging from data transmission and metrology to manufacturing. Masers, by contrast, have so far found hardly any practical applications.
Dark matter’s existence is all but certain—astronomers believe it makes up about a quarter of the universe’s total energy content—yet its true identity has eluded us for decades. Two of the leading candidates for dark matter are the hypothetical particles ultralight axions and dark photons, which in the range studied here would be some 19 to 21 orders of magnitude lighter than the electron.
Astronomers have speculated about the mysterious “little red dots” seen through the James Webb Space Telescope’s images of the early universe: They could be galaxies, black holes, quasi-stars, starbursts … or something else entirely.
Using observations from multiple powerful telescopes, a team of astronomers studied a red quasar nicknamed “the Hatchling” at redshift 3.7. They may have identified one of the clearest examples yet of a quasar caught in transition between a heavily obscured and fully exposed phase.
Chiral phonons are groups of atoms that move in a circular direction when excited by an energy source, such as heat. As the phonons move through a material, they propagate that circular motion, or angular momentum, through the material. The angular momentum serves as the source of spin, and the chirality dictates the direction of the spin, enabling spin control in spintronics.
You might think of rockets as powerful vehicles that blast astronaut crews and robotic missions into space. But what if they could be used to send cargo from one side of Earth to the other in a fraction of the time it would take a plane? The company SpaceX recently announced a project that aims to use its rockets to do just that.
Researchers from the U.S. National Science Foundation National Solar Observatory (NSF NSO), the Max Planck Institute for Solar System Research (MPS) in Germany, and the High Altitude Observatory (HAO) in the U.S. have made a discovery in solar physics. New images of the sun’s surface taken with the world’s largest solar telescope, the NSF Daniel K. Inouye Solar Telescope, built and operated by the NSO in Hawaii, along with sophisticated computer simulations, reveal tiny plasma vortices that had never before been visible.
LVMPD officers were dispatched to reports of a man who appeared to be intoxicated; the man opened fire immediately as they arrived, fatally wounding Officer Austin Abdelnabi
A judge ordered a retrial for Rafael Jones in the shooting death of Officer Moses Walker Jr. after the case was found to have involved disgraced detective Philip Nordo
Venus may be overwhelmingly inhospitable today, but many planetary scientists believe that it wasn’t always this way. Billions of years ago, some observational evidence suggested that our planetary neighbor may have looked far more like Earth, complete with oceans potentially capable of harboring life.
Scientists plan to use a total solar eclipse that will be visible in Spain next week as a rare chance to learn more about the stormy, unpredictable nature of our star.
Suddenly, the world is plunged into an eerie, violet darkness. The temperature drops. Birds and other animals, bewildered by unforeseen night, start behaving strangely. Stars and planets appear in the sky next to the blotted-out sun.
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