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Imagine generating electricity without batteries, fuel, or traditional solar panels—simply by using water evaporation and the heat naturally present in the surrounding environment. Researchers led by Wu have developed a new technology called a vertical microrod generator (VMG) that could make this idea much more practical. The device uses evaporation-driven water movement to generate electricity, while a machine-learning-guided design helps water and ions move much faster and in a more organized direction. The result is a compact energy generator that reaches a power density of 14.3 watts per square meter and a power conversion efficiency of 21.5% . Even more importantly, the system can operate for at least 30 days under normal ambient conditions and maintain an efficiency above 20% across a 30-kelvin temperature range . This could open a new pathway for producing electricity in places where conventional power sources are difficult to use. The Untapped Energy Around Us The atmosphe...

Fuel cells are often described as a promising clean-energy technology because they can produce electricity from hydrogen without directly releasing carbon dioxide at the point of use. But making fuel cells powerful, durable and practical at the same time remains a major engineering challenge. Now, researchers led by Zhenguo Zhang and his team have developed an unusually thin membrane that could help solve one of the biggest problems in high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) . The new membrane is only 20 micrometres thick , yet it is mechanically strong, can repair itself, and helps the fuel cell operate efficiently at temperatures as high as 200°C . Even more impressive, a fuel cell using this membrane reached a peak power density of 3.08 watts per square centimetre at 200°C and showed almost no performance degradation during a 503-hour test . Why high-temperature fuel cells matter Polymer electrolyte membrane fuel cells generate electricity through an e...

Imagine a building painted in a beautiful blue, green, or red color that stays noticeably cooler than the surrounding air—even under strong sunlight. Normally, dark and colorful surfaces absorb sunlight and become hot. But scientists have developed a new type of coating that could change this problem. Researchers led by Ying Liu have developed a biomass-derived, colorful cooling coating made from ethyl cellulose. The material can reflect most of the sunlight that hits it while also releasing heat into the coldness of outer space. Most importantly, it can produce different colors without sacrificing its cooling performance . The technology could eventually help make buildings, vehicles, outdoor equipment and other surfaces cooler without requiring electricity. Why Is Passive Cooling Important? Buildings absorb a huge amount of solar energy during the day. As roofs and walls heat up, people often rely on air conditioners to maintain comfortable indoor temperatures. Air conditioning can...

For more than five decades, physicists have searched for something that sounds almost impossible: a new form of matter made entirely from the particles that carry a force . Now, scientists working at the Beijing Spectrometer III (BESIII) experiment in China have reported experimental evidence confirming the existence of a glueball — a particle believed to be made entirely of gluons, the particles responsible for carrying the strong nuclear force. If confirmed as described, the result would be a major achievement in particle physics. It would provide evidence that force-carrying particles can interact with one another and form a completely new type of matter. What exactly is a glueball? To understand why this discovery is so important, we first need to look at what ordinary matter is made of. According to the Standard Model of particle physics, matter is built from fundamental particles called fermions . Quarks are among them. Different combinations of quarks form larger particles such...

A spinal cord injury can change a person’s life in an instant. Damage to the spinal cord can cause long-term problems with movement, sensation and independence. When the injury occurs in the neck, the consequences can be even more serious because the damaged nerves may interfere with the signals that control breathing. Now, researchers at Gladstone Institutes have reported a promising step toward repairing this damage. In a new study published in Science Translational Medicine , scientists showed that human stem cell-derived spinal neurons could survive after being transplanted into injured rats, connect with existing neural circuits and improve breathing-related motor function. The research does not yet represent a treatment for people. However, it provides important evidence that damaged spinal cord networks may eventually be repaired by replacing specific types of neurons that have been lost. Why spinal cord injuries are so difficult to repair The spinal cord acts as a major communi...

Imagine a planet suddenly being thrown out of its solar system and sent into the cold darkness between the stars. What happens to its moons? For a long time, scientists assumed that a moon would probably be lost during such a violent event. After all, planets can be ejected from their systems when another planet gives them a powerful gravitational kick, or when a passing star disturbs the entire planetary system. But new research suggests something surprising: many moons could survive the chaos and travel through interstellar space with their planet. The study, conducted by astronomers Yannick Badoux and Simon Portegies Zwart at Leiden Observatory , explores what happens to moons when their planets are thrown out of their original star systems. The researchers simulated nearly 34,000 different stellar encounters , examining different distances, directions and angles of encounters and tracking what happened to both planets and their moons. Their findings reveal that a moon's distanc...

Uranus is already one of the strangest planets in our Solar System. It rotates almost completely on its side , has an unusual magnetic field, and experiences seasons unlike anything on Earth. Now, scientists have discovered another remarkable feature: the invisible boundary surrounding Uranus changes shape and size every day, almost as if the planet is breathing. This boundary is called the bow shock , and new computer simulations combined with observations from NASA's Voyager 2 spacecraft have helped scientists understand why it behaves so strangely. A Planet That Rolls Through Space Most planets in the Solar System rotate with their axes tilted by relatively small amounts. Earth, for example, has an axial tilt of about 23.5 degrees, which gives us our seasons. Uranus is completely different. Its rotation axis is tilted by more than 90 degrees relative to the plane of its orbit. In simple terms, Uranus essentially rolls around the Sun on its side . This extreme tilt affects almo...