Helium leaks are hard to detect, since it is odorless, colorless, tasteless, and does not react with other chemical substances. In Applied Physics Letters, by AIP Publishing, researchers from Nanjing University developed a device that utilizes sound waves to detect helium. The researchers built a device inspired by a traditional Japanese bamboo weaving technique called “Kagome-biki.” The triangular device also allows the researchers to determine the location of helium leaks in a 2D space and the researchers hopes to expand the device to locate leakage points in 3D space and develop the system into a portable device.

SAN ANTONIO — December 16, 2025 — After less than a year in orbit, the Southwest Research Institute-built PUNCH spacecraft have made major accomplishments, imaging the Sun in context while tracking comets and enormous space weather events as they traveled through the inner solar system. SwRI’s Dr. Craig DeForest discussed the achievements of NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission during a media roundtable at the AGU25 conference on Dec. 16.

Space manipulators play an important role in the on-orbit services and planetary surface operation whose reliability is a key issue. In the extreme environment of space, space manipulators are susceptible to a variety of unknown disturbances. Since it is difficult for the manipulator to be repaired immediately, once it fails, it will mean that it cannot complete the mission as expected, which may cause serious losses and dangers. How to have a resilient guarantee, i.e., the manipulator’s ability to resiliently recover and continue to complete tasks, in failure or disturbance is the core capability of its future development. The motion planning unit is used as the computing terminal of the manipulator’s joint motion trajectory. Compared with traditional motion planning, learning-based motion planning has gradually become a hot spot in current research. However, no matter what kind of research ideas, the single robotic manipulator is studied as an independent agent, making it unable to provide sufficient flexibility under conditions such as external force disturbance, observation noise, and mechanical failure.

Accurate, real-time monitoring of ionospheric dynamics is essential for understanding space weather and protecting satellite-based navigation and communication systems. 

When two black holes merge or two neutron stars collide, gravitational waves can be generated. They spread at the speed of light and cause tiny distortions in space-time. Albert Einstein predicted their existence, and the first direct experimental observation dates from 2015. Now, Prof. Ralf Schützhold, theoretical physicist at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), is going one step further. He has conceived an experiment through which gravitational waves can not only be observed but even manipulated. Published in the journal Physical Review Letters (DOI: 10.1103/xd97-c6d7), the idea could also deliver new insights into the hitherto only conjectured quantum nature of gravity.

Acute sepsis alters how intravenous fluids and vasoactive drugs function in the body. Using a sheep model, researchers examined how sepsis affects the distribution of crystalloid fluids and the effectiveness of vasoactive drugs. Results showed that sepsis reduced urine output, weakened drug responses, and caused fluid to accumulate in the interstitial “third fluid space.” These findings highlight how sepsis disrupts normal fluid regulation, complicating effective fluid and drug management during treatment.