Several studies have predicted that not all geomagnetic reversals have been discovered, but it was unknown in which periods they might be hidden. The researchers led by the National Institute of Polar Research used a statistical method called adaptive kernel density estimation to model the frequency of geomagnetic reversals at high temporal resolution. Based on the model, they proposed that undiscovered reversals may be hidden in four periods after the Cretaceous Normal Superchron.

Tokyo, Japan – Researchers from Tokyo Metropolitan University have created a new molecule which carries DNA into biological cells, to treat or vaccinate against illnesses. Many existing options rely on molecules with a strong positive charge, which can cause harmful inflammation. The team overcame this by using a neutral molecule and a new method to bind DNA to it, making it possible to deliver DNA into cells. Successful experiments in mice promise new, more effective therapies.

Current models of mortality risk after heart failure (HF) rely primarily on cardiac-specific clinical variables and may underestimate risk in elderly East Asian patients. Researchers from Japan used machine learning to analyze data from a nationwide registry of elderly HF patients. Their new model includes metrics of physical function and improved risk reclassification by about 20% compared to existing models, and could improve treatment options for patients in the future.

A Japanese study of more than 7,400 patients has identified a genetic mismatch that sharply increases the risk of severe acute graft-versus-host disease (GVHD) following umbilical cord blood transplantation. The specific donor–recipient human leukocyte antigen mismatch triples the likelihood of life-threatening immune complications, and severe acute GVHD itself is associated with significantly worse survival. These findings may help refine donor selection and improve the safety and long-term outcomes of stem cell transplantation.

Smart cushioning materials with sensing features can enable real-time detection of damage to transport goods. However, current sensing technologies require wired connections for power and data transmission, limiting applicability. In a new study, researchers have developed a novel origami-inspired wireless, battery-free smart cushioning material that can accurately detect and provide measurement of damage to transported goods. This material holds strong potential for improving logistics and transport traceability.

Tall structures face the challenge of uplift forces from the wind. At the same time, constructions projects continue to generate large volumes of surplus soil. A team of Japanese researchers, led by Professor Shinya Inazumi investigated a winged composite pile foundation that emerges as a potential solution to both of these challenges. Model-scale experiments and numerical analyses demonstrate that some critical factors that influence the performance include wing size, soil density, and corrugated steel surfaces.

The University of Osaka’s Center for Quantum Information and Quantum Biology (QIQB) is a premier research institute in Japan, distinguished by its extensive global network of leading institutions worldwide.

Cleaner fish interacted with a mirror in their tank in a way that suggests ‘contingency testing’ intelligence, a higher form of smarts typically found in mammals. This finding coupled with faster self-recognition than previously thought, expands our image of intelligence in these social fish.

Getting enough sleep may be more important for heart health than many busy professionals realize. A new multicenter study conducted by researchers from Kumamoto University and the National Cerebral and Cardiovascular Center, has found that insufficient sleep is linked to a higher risk of atrial fibrillation (AF) among working-age adults.