A round-trip journey of electrons: Electron catalysis enables direct fixation of N2 to azo compounds
Peer-Reviewed Publication
Updates every hour. Last Updated: 26-Aug-2025 20:11 ET (27-Aug-2025 00:11 GMT/UTC)
An international team of scientists has synchronized key climate records from the Atlantic and Pacific Oceans to unravel the sequence of events during the last million years before the extinction of the dinosaurs at the Cretaceous/Paleogene boundary. New high resolution geochemical records for the first time reveal when and how two major eruption phases of gigantic flood basalt volcanism had an impact on climate and biota in the late Maastrichtian era 66 to 67 million years ago. Their study was now published in Science Advance.
Producing high-performance titanium alloy parts — whether for spacecraft, submarines or medical devices — has long been a slow, resource-intensive process. Even with advanced metal 3D-printing techniques, finding the right manufacturing conditions has required extensive testing and fine-tuning.
What if these parts could be built more quickly, stronger and with near-perfect precision?
A team comprising experts from the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, and the Johns Hopkins Whiting School of Engineering is leveraging artificial intelligence to make that a reality. They’ve identified processing techniques that improve both the speed of production and the strength of these advanced materials — an advance with implications from the deep sea to outer space.
Recent outbreaks of highly pathogenic avian influenza (also known as bird flu) have created a need for rapid and sensitive detection methods to mitigate its spread. Now, researchers in ACS Sensors have developed a prototype sensor that detects a type of influenza virus that causes bird flu (H5N1) in air samples. The low-cost handheld sensor detects the virus at levels below an infectious dose and could lead to rapid aerosol testing for airborne avian influenza.