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Imagine a drone flying right in front of you, yet you can barely notice it. It may sound like science fiction, but engineers at Northwestern University have developed a new drone that almost disappears from sight by taking advantage of the way the human eye works. Instead of using expensive camouflage, transparent materials or futuristic invisibility technology, the researchers created a drone that hides in plain sight through rapid spinning. The new design, called "Phantom Twist," uses a simple but powerful optical illusion that makes it appear as nothing more than a faint blur. A New Approach to Making Drones Less Visible For many years, scientists have been trying to make drones invisible. Most attempts focused on covering drones with camouflage, using transparent materials or bending light around them. While these methods can work in certain situations, they are often complicated, expensive and difficult to use in real-world environments. The Northwestern University tea...

Knitting has traditionally been associated with cozy sweaters, scarves, blankets, and winter clothing. But now, researchers have transformed this centuries-old craft into an advanced engineering technology. Scientists at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed machine-knitted fabrics that can change shape, switch between stable positions, and even function as electronic sensors and switches. This breakthrough could pave the way for a new generation of smart textiles capable of monitoring body movement, controlling electronic devices, and changing their shape whenever needed. A New Era of Smart Knitted Fabrics The research team created machine-knitted fabrics that can "snap" between multiple stable shapes. Scientists call this unique property multistability , where a structure can naturally remain in more than one stable position without continuously applying force. Think about a regular light switch. It stays either ON or...

When astronomers look into deep space using powerful radio telescopes, they are not just seeing stars and galaxies. They are also detecting a special type of light called synchrotron radiation . This radiation is produced when tiny charged particles, such as electrons, travel at extremely high speeds through magnetic fields. Synchrotron radiation helps scientists study some of the most energetic objects in the universe, including black holes, pulsars, supernova remnants, and distant galaxies. By analyzing this radiation, astronomers can learn about magnetic fields, particle speeds, and the physical conditions in space. However, one important question has puzzled scientists for years. What happens if the magnetic field is not smooth or uniform? Since magnetic fields in space are usually uneven and constantly changing, could these irregularities affect the radiation that reaches Earth? A new study by Beskin and his team has now provided an answer. Their research shows that although une...

Space is full of strange and mysterious objects, but few are as fascinating as pulsars . These tiny, ultra-dense stars spin hundreds of times every second and send powerful beams of light and radio waves across space like giant cosmic lighthouses. For many years, scientists believed they understood why these stars sometimes suddenly spin faster. But then astronomers discovered something completely unexpected—some pulsars suddenly slow down instead of speeding up. This strange event is called an anti-glitch , and for years no one could explain how it happens. Now, a new study by Long and his team suggests that the answer may lie in powerful magnetic starquakes . Their idea could explain both sudden speed-ups and slowdowns using the same process. What Is a Pulsar? A pulsar is the leftover core of a massive star that exploded in a supernova. Although a pulsar is only about 20 kilometers (12 miles) wide, it contains more mass than our Sun. This makes it one of the densest objects in the ...

What happened in the first tiny fraction of a second after the Big Bang? This is one of the biggest questions in modern science. During that time, the universe expanded incredibly fast in an event called cosmic inflation . Scientists believe this rapid expansion created tiny ripples in space that later grew into galaxies, stars, and planets. Now, a new study by Khan and his team suggests that these tiny ripples may have left behind two important clues that still exist today. One is a special type of dark matter , and the other is a unique background of gravitational waves . The exciting part is that both of these signals may have come from the same event during inflation . If future experiments detect them, scientists could learn more about how the universe looked just after the Big Bang. The Universe Still Has Hidden Secrets Scientists have learned a lot about the early universe by studying the Cosmic Microwave Background (CMB) . This ancient light was released about 380,000 years af...

Imagine a robot that can keep its balance without cameras, sensors, or powerful computer software. Or buildings and machines that remain stable without constantly monitoring every movement. It may sound like science fiction, but researchers have now discovered a surprising law of physics that could make it possible. Scientists from NYU Tandon School of Engineering and Stony Brook University have demonstrated that two unstable mechanical behaviors can combine to create a stable system —if they are switched at exactly the right rhythm. Their groundbreaking study, published in Nature Communications , could change how engineers design robots, aircraft, buildings, and even futuristic metamaterials. A New Way to Keep Machines Stable Many modern machines rely on active control systems to remain stable. For example, a walking robot constantly uses sensors to detect its position and software to calculate how to avoid falling. Aircraft wings use sensors and control systems to prevent dangerou...

Dark matter is one of the biggest mysteries in the Universe. Scientists know it exists because its gravity affects stars, galaxies, and even the large-scale structure of the cosmos. However, no one has directly detected it yet or knows exactly what it is made of. One interesting idea is that dark matter may be made of Primordial Black Holes (PBHs) . These are not ordinary black holes formed from dying stars. Instead, they may have formed just a fraction of a second after the Big Bang, when the Universe was extremely hot and dense. For many years, scientists believed that these black holes, if they exist, would be spread throughout space as individual objects. But some theories suggest something different—they may have formed in large clusters . A new study by researchers Tkachev and Pilipenko investigates what happened to these clusters over billions of years. Their results show that many of them may have slowly broken apart due to repeated gravitational encounters inside the Milky Wa...