Previous studies may have underestimated how much Mercury has contracted as the planet cooled over billions of years because its rough surface hides some of the geological evidence.

Electric fields can reliably reverse magnetization in nanoscale structures of the multiferroic material BiFe_0.9Co_0.1O₃ (BFCO), as reported by researchers from Science Tokyo. Multiferroic materials display coupled electric and magnetic order, making them attractive for low-power memory devices. The team fabricated 190 nm BFCO nanodots and used advanced imaging techniques to directly observe the restructured electric polarization arrangement upon applying an electric field, driving a persistent reversal of magnetization.

Thorium-229, a promising basis for nuclear clocks, has a rare nuclear transition that can be excited with laser light. However, nuclei embedded in crystals are affected by their local environments. Now, researchers have used laser Mössbauer spectroscopy to identify four distinct sites occupied by thorium-229 in calcium fluoride crystals. The team characterized their electric field environments, measured site-selective properties, and identified microscopic structures for the two dominant configurations, providing information for designing solid-state nuclear clocks. 

Researchers have developed an AI-based system that automatically and objectively detects the moment when fish experience loss of equilibrium (LOE) due to temperature stress. The system combines DeepLabCut, a deep-learning AI that captures animal posture from video, with ResNet34, a deep-learning AI-based image-classification technology. Their system is expected to help predict the effects of climate change on fish. The research team was led by Specially Appointed Lecturer Tomoya Nakayama and Yoshiya Matsuo (a master’s student at the time) of the Institute of Transformative Bio-Molecules (WPI-ITbM) at Nagoya University, in collaboration with Associate Professor Tatsuto Hasegawa and Takuya Kato (a master’s student at the time) of the University of Fukui. Their research was published in the journal Scientific Reports on September 10, 2026.

Kyoto, Japan -- Amphibian larvae -- often known as tadpoles -- exhibit a behavior known as social aggregation, where they gather together as a way to avoid predators. These interactions are evidence of their association preferences, or their tendency to recognize members of their own species. Some varieties of tadpoles have even shown a preference for their siblings.

These association preferences and kin recognition in tadpoles have become a key topic in understanding the evolution of social behavior. Recent studies have suggested that microorganisms may be influencing communication through animal body odors, indicating the possibility that pond water rich in microbes may also affect social behavior. Yet whether this sociality is innate, shaped by early life experiences, or the aquatic environment, has remained unclear.

This uncertainty motivated Kazuko Hase at Kyoto University to investigate how early-life social experiences and the aquatic environment influence the development of sociality.

New Reactor Developed to Efficiently Enable Solid Organic Waste Solubilization and Methane Production by Anaerobic Microorganisms

Kinesin is a vital molecular motor that transports cargoes along microtubule tracks in the cell, but atomic structural dynamics of its guiding neck region have remained unresolved. Researchers performed massive all-atom molecular dynamics simulations on the supercomputer Fugaku to accurately model this neck region and observed its physical interactions with the microtubule surface. The study revealed that physical contact between the neck region and the track surface directs the motor to step forward with a counterclockwise bias, providing a structural foundation for understanding fundamental intracellular transport mechanics. 

Nephrotic syndrome is caused when the filtering system in the kidneys is damaged, allowing large amounts of protein to leak into the urine. It is usually treated with steroids, but in some cases steroids alone are insufficient, and long-term steroid use has serious side effects. Some patients develop a difficult-to-treat form of the disease which returns when the steroid dose is reduced. For these patients, the intravenous drug rituximab (RTX) has been found to be effective. RTX removes B cells from the blood, a type of immune cell thought to contribute to the disease. Now, researchers from Nagoya University in Japan have found that the drug does more than eliminate B cells. It also triggers a reaction in another immune cell type, T cells, increasing their energy production and lowering cell stress in patients who respond to RTX treatment. These changes were largely absent in non-responders. The findings, published in iScience, identify a previously unknown link between B cells and T cells that could help predict how a patient with nephrotic syndrome will respond to RTX. 
 

A new theoretical framework reveals how thermoelectric materials, electrodes, and heat leakage work together to determine the time-dependent response of thermoelectric systems. By identifying a common scaling law governing this behavior, the study provides a new basis for optimizing materials, electrode structures, and measurement conditions as an integrated system.

Kyoto, Japan -- As tiny as they are, marine plankton play pivotal roles in biogeochemical cycles and in sustaining aquatic ecosystems, producing around half of the oxygen on Earth and also acting as carbon sinks. When they die, their decomposing cells produce dissolved organic carbon that can be transformed and stored in the ocean for thousands of years, so understanding plankton mortality is essential for uncovering the mechanisms behind marine ecosystems.

However, assessing the death of a particular plankton population out of a community consisting of hundreds of coexisting species poses a complex challenge. A team of researchers at Kyoto University addressed this by focusing on viral infection and cell lysis, the process through which a cell's membrane breaks down and releases its genetic information into the environment.

First, the team developed a method for measuring plankton lysis by growing cultures of two phytoplankton species, diatoms and raphidophytes, in a seawater-based medium, and then extracting rRNA and quantifying it using digital PCR. Since rRNA released into seawater degrades over time, the researchers added a culture of spike-in ribosomes to the medium and measured the degradation rate constant. The resulting flux model incorporated both changes in host cell-free rRNA and the degradation constant, making it possible to accurately assess the rate of cell lysis.