At times the sun ejects energetic material into space which can have consequences for space-based and even ground-based electronic technology. Researchers aim to understand this phenomenon and find ways to forecast it, including how ejected material evolves as it travels through the solar system. For the first time, researchers, including those from the University of Tokyo, made high-quality measurements of an evolving cloud of solar ejecta by using multiple space-based instruments which were not designed to do so, and observed the way the clouds reduce background cosmic-ray activity.

Poor oral health may increase dementia risk through both biological and social pathways, as reported by researchers from Science Tokyo. Drawing on recent epidemiologic research, the team highlights how eating and speaking difficulties might act as overlooked social mechanisms that may amplify risk by contributing to social isolation. Moreover, in a longitudinal study, they also found that poor oral health is a strong predictor of weight loss in older adults.

Using muon spin rotation spectroscopy, researchers from Japan and Canada successfully captured the rapid conversion of an imidoyl radical into a quinoxalinyl radical occurring within nanoseconds. The technique enabled real time detection of a highly reactive aromatic heterocyclic radical generated during the isocyanide insertion reaction, using muonium as a molecular tracker. The discovery is expected to advance particle-driven radical chemistry—exploring functional properties and offering new strategies for molecular transformation reactions.

Despite rapid robotic automation advancements, most systems struggle to adapt their pre-trained movements to dynamic environments with objects of varying stiffness or weight. To tackle this challenge, researchers from Japan have developed an adaptive motion reproduction system using Gaussian process regression. By learning the relationship between human motion and object properties, their method enables robots to accurately replicate human grasping behaviors using small training datasets and manipulate unfamiliar objects with remarkable precision and efficiency.

Widely used eye ointments can cause glaucoma implants to swell and potentially rupture, according to new research from Nagoya University in Japan. This study is the first to show, using clinical and experimental evidence, that petrolatum-based eye ointments can compromise the PRESERFLO® MicroShunt, an implant used in over 60 countries to treat glaucoma.

Kyoto, Japan -- What we know of the birth of a black hole has traditionally aligned with our perception of black holes themselves: dark, mysterious, and eerily quiet, despite their mass and influence. Stellar-mass black holes are born from the final gravitational collapse of massive stars several tens of the mass of our Sun which, unlike less massive stars, do not produce bright, supernova explosions.

Or at least, this is what astronomers had previously thought, because no one had observed in real time the collapse of a massive star leading to a supernova and forming a black hole. That is, until a team of researchers at Kyoto University reported their observations of SN 2022esa.

The Kyoto team had wondered whether all massive stars -- those that are at least 30 times the mass of the Sun -- die quietly without a supernova explosion, or if in some cases they are accompanied by an energetic and bright, special type of supernova explosion. The astronomers then discovered a type Ic-CSM class supernova that appeared to be an explosion of a Wolf-Rayet star, which are so incomprehensibly massive and luminous that astronomers believe them to be the progenitors of black hole formation.

A research team at The University of Osaka revealed that the loss of heterochromatin can cause a chain reaction leading to genetic changes and the subsequent development of diseases including cancer. Using fission yeast, the study specifically found that loss of Clr4, which encodes a methyltransferase, can induce an increase in R-loop levels at pericentromeric repeats, and the later conversion of R-loops into ADR-loops can prompt gross chromosomal rearrangements.

Kyoto, Japan -- While investigating the FGF21-oxytocin-dopamine system, a mechanism that regulates sugar appetite, a team of researchers at Kyoto University noticed reports suggesting that the protein FGF21 may regulate alcohol ingestion. The team's original aim had been to address sugar appetite in lifestyle-related diseases, but since alcohol is a fermented product of sugar, they speculated that perhaps the body contains a system that recognizes both alcohol and sugar as the same entity.

Excessive alcohol consumption is a major global health issue, and effective countermeasures for prevention and treatment are limited. Patients with alcohol dependence generally have a low adherence to pharmaceuticals, and many avoid drug treatment because it deprives them of the pleasure of drinking.

"It was important that any intervention provide pleasure and act as a substitute for alcohol," says corresponding author Sho Matsui. "We imagined that some functional sugars may be able to fill that role."

Ultraviolet-B (UV-B) semiconductor lasers are highly sought for medical, biotechnology, and precision manufacturing applications; however, previous UV-B laser diodes were limited to pulsed operation or required cryogenic cooling, making continuous room-temperature operation unattainable. Researchers in Japan report the world’s first continuous-wave UV-B semiconductor laser diode operating at room temperature on a low-cost sapphire substrate. This breakthrough advances compact, energy-efficient UV light sources, potentially replacing bulky gas-based lasers in healthcare, industrial, and scientific research applications worldwide.

Heat stress limits the performance of biofertilizer microbes in hot climates. Researchers at QST combined adaptive laboratory evolution with repeated, precisely dosed gamma irradiation to rapidly generate Bradyrhizobium strains that thrive at higher temperatures, suggesting a faster, non‑transgenic route to robust industrial microorganisms with broad sustainability benefits for agriculture, biomanufacturing, and renewable fuels.