As humans began to explore outer space in the latter half of the 20th century, radio waves proved a powerful tool. Scientists could send out radio waves to communicate with satellites, rockets and other spacecraft, and use radio telescopes to take in radio waves emitted by objects throughout the universe.
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Picture this: It’s the 18th hole and the game’s on the line. You line up your putt, take a breath, and roll the ball toward the hole. The pace is firm, the line looks good—until the ball dips in, then cruelly pops back out onto the green. New research led by the University of Bristol has looked at the physics of what’s known as the golf lip out.
A theoretical framework predicts the emergence of non-reciprocal interactions that effectively violate Newton’s third law in solids using light, report researchers from Japan. They demonstrate that by irradiating light of a carefully tuned frequency onto a magnetic metal, one can induce a torque that drives two magnetic layers into a spontaneous, persistent “chase-and-run” rotation. This work opens a new frontier in non-equilibrium materials science and suggests novel applications in light-controlled quantum materials.
Geiger-mode avalanche photodiodes (GM-APDs) are highly sensitive light detectors, capable of detecting single photons. Photons of certain wavelengths, when absorbed by photodiodes, generate electron-hole pairs in a process called impact ionization which can result in a multiplication of charges when occurring in an electric field.
Researchers have developed a highly sensitive method for detecting hotspots in the environment, such as bushfires or military threats, by harnessing the focusing power of meta-optical systems.
Having good neighbors can be very valuable—even in the atomic world. A team of Amsterdam physicists was able to determine an important property of strontium atoms, a highly useful element for modern applications in atomic clocks and quantum computers, to unprecedented precision. To achieve this, they made clever use of a nearby cloud of rubidium atoms. The results were published in the journal Physical Review Letters this week.
A solution to a tricky groundwater riddle from Australia: Researchers at TU Wien have developed numerical models to simulate the movement of fluids in porous materials.
The Eagle Point Police chief and an officer were speaking with a suspect before he became agitated, grabbed a knife and wounded the officer
The suspect, wanted for wounding a Jacksonville police officer and K-9, has been added to the Texas 10 Most Wanted list
The Slidell officer hitched a ride with a bystander, who followed the suspect as she got in a vehicle to flee; the cop relayed information to colleagues, who arrested the suspects
Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can light up the sky for months, these explosions play important roles in the cosmos. Supernovas create heavy elements and spread them out into their surroundings, where they can be taken up in the next round of planet and star formation.
Sometimes space exploration doesn’t go as planned. But even in failure, engineers can learn, adapt, and try again. One of the best ways to do that is to share the learning, and allow others to reproduce the work that might not have succeeded, allowing them to try again. A group from MIT’s Space Enabled Research Group, part of its Media Lab, recently released a paper in Space Science Reviews that describes the design and testing results of a pair of passive sensors sent to the moon on the ill-fated Rashid-1 rover.
For years, astronomers have been on the hunt for the first generation of stars, primordial relics of the early universe. And now they may have just found them. Ari Visbal from the University of Toledo, Ohio and colleagues believe they’ve glimpsed so-called Population III (Pop III) stars following a detailed analysis of previous James Webb Space Telescope (JWST) observations of a distant galaxy called LAP1-B.
Quantum computers have the potential to model new molecules and weather patterns better than any computer today. They may also one day accelerate artificial intelligence algorithms at a much lower energy footprint. But anyone interested in using quantum computers faces a steep learning curve that starts with getting access to quantum devices and then figuring out one of the many quantum software programs on the market.
As fascinating as it may sound, it’s true. The ‘event’ happened in Florence, Italy, on October 27, 1954. In October of 1954, a match involving the Italian team Fiorentina was interrupted by mysterious visitors hovering above the stadium. The Fiorentina UFOs were part of a wave of mass-sightings across Europe – and it remains a mystery to this day. On that occasion one of the most massive UFO sightings in history took place: around 10 thousand people who were in the Artemio Franchi stadium watching the encounter between Fiorentina and Pistoiese witnessed the appearance of unidentified flying objects in the skies above the stadium.  Eventually, the match had to be suspended “because the spectators saw something in the sky” according to the official report of the match referee. According to the testimony of one of the players present in that match, defender Ardico Magnini, who was something of a legend at the club and had played for Italy at the 1954 World Cup. “I remember everything from A to Z,” he says. “It was something that looked like an egg that was moving slowly, slowly, slowly. Everyone was looking up and also there was some glitter coming down from the sky, silver glitter. “We were astonished we had never seen anything like it before. We were absolutely shocked.” He also remembered that a strange sticky and shiny material fell on the ground. Other testimonies relate the presence not of one but of several strange objects in the sky.  In the following days, numerous other UFO sightings were recorded in the towns near the stadium. That unknown substance did not only fall on the court, but it covered a good part of Florence before evaporating. Those who came into contact with this material describe it as similar to cotton but ungraspable as it disintegrated on contact. An explanation, rare but scientific, of this phenomenon, arrived many years later: it could have been large networks of connected webs, which appeared in the sky as globes, shining by the reflection of the Sun since that is how spiders migrate. Curiously, October coincides with the time of migration of the northern hemisphere spiders. However, the material found simultaneously with the appearance of UFOs was analyzed in the laboratory and the elements found do not coincide with those that are part of spider webs. Therefore, until this day, whatever the spectators and players saw floating above the Artemio Franchi stadium remains a profound mystery, and one of the best documented UFO cases in history. Source: The day UFOs stopped play |
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