Protecting rivers, lakes, wetlands, and reservoirs requires more than collecting water samples. Monitoring systems must also detect emerging risks, explain why water quality is changing, evaluate whether management actions are working, and provide reliable evidence for regulatory decisions.

The SDSS-V Black Hole Mapper reaches a milestone with its first southern hemisphere optical observations, coordinated eROSITA X-ray identification, and multi-epoch tracking of accreting black holes across the universe.

Using a combination of laser cooling techniques and strong magnetic fields, researchers at Colorado State University have created an ultracold neutral plasma with electrons cooled to temperatures measured to be within one degree Kelvin (absolute zero) for the first time. The work, highlighted in Physics of Plasmas, outlines an approach to better validate theory and refine models with this common state of matter under these and other extreme conditions. Among many potential applications, the findings will be helpful for the future development of fusion energy systems and the study of astrophysical systems such as white dwarf stars. 

One hundred years after the technique was recognized with the Nobel Prize in Chemistry, analytical ultracentrifugation (AUC) is still making waves in the scientific world. Theodor Svedberg developed the approach in the 1920s, using it to characterize tiny gold particles. Now, AUC helps researchers determine specific properties of individual molecules clustered together, such as those used in pharmaceuticals or industrial chemicals.

Syracuse University biologists connect humpback whale song structure to diving behavior for the first time, a breakthrough that could allow researchers to infer whale behavior from acoustic recordings and better monitor the effects of human activity in the ocean.

High-capacity lithium-ion anodes often undergo an “activation” process in which capacity initially decreases and then gradually recovers during cycling, delaying full battery performance. Researchers have now shown that this behavior is strongly dependent on particle size. Using a Sn-based model system, the team found that large particles exhibit pronounced activation, whereas small particles show little to no activation. Their results reveal that the difference arises from a stress-induced kinetic retardation during lithiation, providing new guidance for the design of advanced battery materials.

A research team led by Prof. Jin Ge reports a strategy to markedly enhance iontronic mechanical sensors by tuning two previously underexplored electrical parameters—ionic conductivity and excitation frequency. Through a droplet-based model system combined with impedance spectroscopy and equivalent circuit analysis, the study establishes a quantitative framework linking these parameters to device impedance and capacitance variation. The results reveal that reducing ionic conductivity while increasing excitation frequency significantly boosts sensitivity, achieving up to 8772% improvement without altering device structure. The approach is further validated in hydrogel-based solid-state systems, demonstrating broad applicability. Prototype devices enable real-time pressure sensing, material differentiation in robotic systems, and 2D pressure mapping, offering a new pathway for the rational design and optimization of iontronic sensors.

The integration of liquid metals into conductive hydrogels has long been hindered by particle instability and coalescence. Researchers from Fuzhou University have developed a novel stabilization strategy using gelatin to create a highly uniform, conductive, and stretchable hydrogel. This "electronic skin" not only monitors human motion with high sensitivity but also utilizes deep learning for real-time handwriting recognition and harvests solar energy via photothermal conversion.

Lignin is a sustainable "gold mine" for green chemicals, yet its complex structure remains difficult to crack. Researchers have now developed an ultra-efficient Ru nanocluster catalyst supported on CeO₂ to convert lignin-derived compounds into high-value 1,4-cyclohexanediol in pure water. By leveraging the Strong Metal-Support Interaction (SMSI) to create active interfaces, this green process achieves a record 96.7% yield, paving the way for sustainable plastic and resin production.