Global coverage from our correspondents.
Science
A new study from UC Santa Barbara proposes that time crystals—objects in perpetual motion at their lowest energy state—could exist without violating the laws of thermodynamics. The research, published in Physical Review Letters, demonstrates a theoretical framework for spontaneous time-translation symmetry breaking, bringing the concept closer to reality.
Science
A new theoretical study from South Korea's Institute of Basic Science proposes that 'dark axion portals' could connect visible matter with the invisible 'dark sector,' potentially explaining the universe's missing mass and energy. The research suggests heavy quarks with a dark charge might bridge the gap, offering a new path for experimental searches.
Science
Researchers at the University of Geneva have demonstrated entanglement of 16 million atoms in a centimeter-sized crystal, providing empirical evidence for a key quantum theory. The breakthrough could accelerate development of quantum networks and secure communication technologies.
Science
As the universe accelerates, evidence of the Big Bang will fade, leaving future civilizations without clues to cosmic origins. Earth's early formation offers a unique vantage point for current astronomers. The phenomenon underscores the fleeting nature of observational cosmology.
Science
A new study in Frontiers in Communication finds that more accurate large language models consume exponentially more energy and produce higher carbon emissions than simpler versions. Researchers tested 14 open-source models, revealing a stark trade-off between performance and environmental cost, prompting calls for task-appropriate model selection.
Science
As NASA prepares to deorbit the International Space Station by 2030, researchers warn that the reentry of the 450-ton structure could release pollutants harmful to the ozone layer. Studies of satellite reentries, including SpaceX's Starlink, suggest significant aluminum oxide emissions. Scientists call for further assessment of atmospheric impacts.
Science
A contractor at the Palisades Power Plant in Michigan fell into a reactor pool while loading fuel rods, ingesting borated water. The worker was decontaminated and returned to work the next day, raising concerns among safety advocates about the plant's restart.
Science
The Moon's slow drift away from Earth means total solar eclipses will become increasingly rare, eventually disappearing entirely in about 620 million years. Scientists trace this to tidal forces slowing Earth's rotation, a discovery rooted in Edmond Halley's 17th-century observations. The upcoming August 21 eclipse offers a rare chance to witness the phenomenon.
Science
Solar power is poised to become cheaper than coal in most parts of the world within four years, with costs projected to drop 66% by 2040. A Bloomberg report highlights significant adoption in Brazil and Germany, signaling a major shift in global energy markets.
Science
As a severe heatwave continues to grip Europe, the Danube River's water levels have dropped so low that a 1,700-year-old Roman bridge has emerged near Bulgaria. Archaeologists are using drones to document the rare find, while other artifacts, including a mammoth tusk and a sunken Nazi warship, have also surfaced.
Science
Tuvalu, a Pacific island nation averaging just 6.5 feet above sea level, is executing a planned relocation of its 11,000 residents through an Australian climate visa program. With over 8,700 registrations for 280 annual spots, the urgency grows as rising seas and intensified storms imperil the country's future.
Science
Researchers have developed a genetically modified corn that produces methionine, an essential amino acid, potentially improving nutrition for millions who cannot afford meat and reducing animal feed costs. The study, led by Rutgers University, shows a 57% increase in methionine in kernels without affecting plant growth.
Science
Researchers in York, England, have discovered microplastics in soil samples dating back to the 1st and 2nd centuries, raising concerns about the integrity of archaeological deposits. The contamination, found in both archived and contemporary samples, suggests plastics have penetrated even historically significant sites.
Science
The UK High Court ruled the government's air pollution strategy unlawful, marking ClientEarth's third legal victory. The court will now oversee clean air policy, responding to the government's repeated failures to meet legal pollution limits. This ruling could influence similar climate cases globally.
Science
As global temperatures approach critical thresholds, scientists and policymakers are revisiting controversial geoengineering proposals. While methods like iron fertilization and aerosol injection offer potential quick fixes, they carry significant risks and require unprecedented international cooperation. The debate underscores the tension between technological fixes and the harder work of emissions reduction.
Science
Nearly a century after the Scopes Trial, the debate over teaching evolution in American public schools persists. While outright bans have been repealed, many educators still face pressure to present alternatives or cast doubt on evolution, despite overwhelming scientific consensus.
Science
String theory, a framework aiming to reconcile general relativity with quantum mechanics, has captivated physicists for decades. Though not yet experimentally proven, its concepts, such as vibrating strings and M-theory, continue to shape theoretical physics and could lead to future technological breakthroughs.
Science
A new study led by Peter Hintz at UC Berkeley suggests that, under certain conditions, crossing a black hole's inner boundary might not be fatal. The research, published in Physical Review Letters, explores how the universe's expansion could allow a fast enough spaceship to pass through the Cauchy horizon. While the scenario remains theoretical, it offers a fresh perspective on the limits of physics and the nature of singularities.
Science
A.P. Moller-Maersk has agreed to sell Denmark's final oil company to France's Total for $7.45 billion, marking the end of Danish corporate ownership of domestic fossil fuel extraction. The deal follows Dong Energy's earlier sale of its oil and gas assets, as Danish firms pivot toward renewables while foreign giants continue North Sea production.
Science
An international team has achieved the most accurate measurement yet of the proton's magnetic moment, reaching a precision of less than one part per billion. The breakthrough, involving a single trapped proton, could refine atomic theory and pave the way for antimatter comparisons at CERN.
