Uncover reality

Mars may look cold, dry, and lifeless today, but deep beneath its surface, the Red Planet appears to be hiding a surprising secret. Scientists have discovered that the interior of Mars’ southern hemisphere is about 200 to 400 degrees Celsius hotter than its northern half. The finding, reported in the journal Nature , suggests that Mars’ interior is not as uniform as scientists once thought. The southern region may also be partially molten , potentially explaining several unusual features observed on the planet’s surface and beneath it. The research was led by Alexander Berne , a Caltech alumnus who is now a postdoctoral associate at the University of Arizona. His team used decades of spacecraft observations to study tiny variations in Mars’ gravity and reveal what may be happening deep inside the planet. Reading Mars Through Its Gravity Scientists cannot directly drill deep into Mars to examine its interior. Instead, they rely on indirect clues, including seismic waves, magnetic measu...

When a space rock enters Earth’s atmosphere, it can transform from a cold, solid object into a glowing fireball before pieces of it finally reach the ground as meteorites. For decades, scientists have often described this process as a rock simply “burning up” or evaporating because of extreme atmospheric heating. A new study suggests the reality is much more complicated. Researchers examined 75 meteorite falls recorded through photographs and videos and identified seven distinct stages in the journey from space rock to meteorite. Their findings, published in Meteoritics & Planetary Science , show that melting and fragmentation—not simply evaporation—are the main processes controlling how these rocks lose mass, slow down and eventually reach Earth’s surface. “We used to think that solid rocks would evaporate from the enormous heat and brilliant light generated in collisions with air,” said lead author Dr. Peter Jenniskens, a meteor astronomer at the SETI Institute and NASA Ames Re...

Imagine buying a luxury watch, pharmaceutical package, electronic device, or valuable artwork and being able to check whether it is genuine using nothing more than your smartphone flashlight and a laser pointer. This may sound like science fiction, but researchers from the Korea Advanced Institute of Science and Technology (KAIST) and Sungkyunkwan University have developed a security technology that could make this possible. The team has created unique artificial fingerprints from randomly assembled nanoparticles . These microscopic patterns are extremely difficult to reproduce, yet they can be authenticated using ordinary sources of light. The research, published in Nature Communications , could open a new approach to anti-counterfeiting and electronic device authentication. Turning Randomness Into Security Modern security systems often depend on digital encryption, passwords and software. But increasingly sophisticated artificial intelligence-driven cyberattacks are creating new chal...

Imagine being trapped beneath heavy rubble after an earthquake. Rescuers know you are there, but the space is too narrow and dangerous for humans or conventional robots to reach you. Then, from a tiny gap in the debris, a cockroach equipped with a camera crawls toward you. It may sound like science fiction, but researchers in Australia are developing technology that could make something remarkably similar possible. Scientists from the University of Queensland (UQ) and biomedical engineers at the University of New South Wales (UNSW) have developed what they call “Paraborgs” —cyborg cockroaches equipped with miniature electronic systems that can potentially locate trapped people and deliver emergency medical assistance. The research, published in Advanced Science , represents an unusual new direction in rescue robotics: instead of building increasingly complex robots, researchers are using the natural abilities of insects themselves. From Searching for Survivors to Helping Them Cyborg ...

Imagine a living plant leaf quietly producing electricity throughout the day—without batteries, solar panels, turbines, or fuel. This may sound futuristic, but scientists have now demonstrated a new form of green energy generation by harvesting electricity from one of nature’s most common processes: leaf transpiration . In a recent study, Hu and colleagues developed a living leaf transpiration generator using a lotus leaf. Their device directly converts energy associated with water movement through the leaf into electrical power. The experiment reveals a previously overlooked form of the hydrovoltaic effect and could open a new direction for sustainable energy technologies. What Is Hydrovoltaic Electricity? Hydrovoltaic electricity refers to the generation of electrical energy through interactions between water and materials, often involving water movement, evaporation, or changes in moisture. Researchers have explored several ways of producing electricity from water. These include ...

For people with serious heart rhythm problems, a pacemaker can be a lifesaving device. It continuously monitors the heart and delivers electrical pulses when the heartbeat becomes too slow or irregular. However, one major limitation has remained for decades: how to keep a pacemaker powered for an entire lifetime without repeatedly replacing its battery. Now, researchers led by Han Ouyang have developed a new type of transcatheter pacemaker that could offer a potential solution. Instead of depending entirely on a conventional battery, the device can harvest energy from the natural movement of the beating heart and convert that mechanical motion into electrical energy. The research introduces what the team describes as a symbiotic transcatheter pacemaker —a small device designed to work closely with the heart while continuously regenerating energy from its movement. In animal experiments, the system demonstrated both energy generation and therapeutic pacing during more than a month of ...

The next generation of wearable electronics could soon become more comfortable, flexible and energy independent. Scientists are developing a new type of power-generating textile that can harvest energy from two sources that are always around us: sunlight and mechanical movement . In a recent development, Chen and his research team have created a micro-cable power textile that combines lightweight solar cells with fibre-based triboelectric nanogenerators. The result is a flexible smart fabric capable of converting both solar energy and everyday mechanical motion into electrical power. The technology could eventually be incorporated into clothing, curtains, tents and other fabric-based products , providing an entirely new approach to powering wearable electronics. The Challenge of Powering Wearable Electronics Wearable technologies are becoming increasingly common. Smartwatches, health-monitoring devices, sensors and other electronic systems can collect useful information while being ...