Rivers in northern Sweden do not always become wider or richer in species further downstream. Natural barriers shape the flow and stop plants from spreading, new research from Umeå University shows.

Researchers at University of Tsukuba have developed a novel method for controlling the optical rotation of conductive polymer polythiophene in a magnetic field at low voltage. This method combines the "Faraday rotation" phenomenon, in which a polarizing plane rotates in response to a magnetic field, with the electrochemical oxidation and reduction of conductive polymers. This method has potential applications in magnetic field sensors and optical communication devices.

With so many environmental issues arising, how can we even begin trying to solve them all? Perhaps, we can start by asking AI. This study highlights how AI can pinpoint viable action plans for these issues.

 A decade-long field study has revealed that biochar, a charcoal-like material made from plant residues, can significantly improve soil quality and boost soybean production in continuous cropping systems. The findings provide new evidence that biochar could be a powerful tool for making agriculture more sustainable.

It begins as a trickle high on the Tibetan Plateau—icy, remote, and pure. By the time it reaches the Three Gorges, the Yangtze River has grown into a force of nature, carrying not just water, but the chemical fingerprint of an entire continent. Now, a groundbreaking study from Peking University reveals the invisible story hidden in the river’s flow: the molecular evolution of dissolved organic matter (DOM) along a 3,500-kilometer stretch of the upper Yangtze—the world’s third-longest river. Published on August 11, 2025, in Carbon Research as an open-access original article, this research was led by Dr. Dongqiang Zhu from the College of Urban and Environmental Sciences and the Key Laboratory of the Ministry of Education for Earth Surface Processes at Peking University, Beijing. Using a powerful suite of analytical tools—including fluorescence spectroscopy, lignin phenol markers, and ultra-high-resolution Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS)—Dr. Zhu’s team traced how organic carbon changes as it travels from the river’s high-altitude headwaters to its densely populated downstream reaches. And what they found is a dynamic, ever-changing mosaic of carbon chemistry shaped by glaciers, grasslands, wildfires, forests, and sunlight.

A team of researchers at Rice has developed a new membrane that selectively filters out lithium from brines, offering a faster, cleaner way to produce the element at the heart of nearly every rechargeable battery.