Study shows unexpected expansion of rare earth element mining activities in Myanmar-China border region
271,479 articles from PhysOrg
Control over friction, from small to large scales
As the demand for rare earth elements increases world-wide, so too do the mining activities associated with rare earth element extraction. Rare earth elements are listed as 15 elements on the periodic table constituting what is known as the lanthanide series, ranging in atomic number from 57 (lanthanum) to 71 (lutetium), as well as scandium (Sc) and yttrium (Y), which serve as essential inputs for...
Detoxifying gold mining
Friction is hard to predict and control, especially since surfaces that come in contact are rarely perfectly flat. New experiments demonstrate that the amount of friction between two silicon surfaces, even at large scales, is determined by the forming and rupturing of microscopic chemical bonds between them. This makes it possible to control the amount of friction using surface chemistry...
'End of century' extreme heat and drought conditions in Europe could occur much earlier than previously thought
Jacqueline "Jackie" Gerson knows very well how "artisanal gold mining" sounds to people who haven't heard the phrase before.
COP28: Why we need to break our addiction to combustion
Simultaneous episodes of extreme heat and drought—typical of a moderate warming scenario predicted for the end of the 21st century—could occur earlier and repeatedly in Europe, reports a study published in Communications Earth & Environment.
Do we live in a giant void? That could solve the puzzle of the universe's expansion, research suggests
Headlines across the world this year focused on fires, including both wildfires and the use of military firepower, in various places.
Researchers decode aqueous amino acid's potential for direct air capture of CO₂
One of the biggest mysteries in cosmology is the rate at which the universe is expanding. This can be predicted using the standard model of cosmology, also known as Lambda-cold dark matter (ΛCDM). This model is based on detailed observations of the light left over from the Big Bang—the so-called cosmic microwave background (CMB).
The news is fading from sight on big social media platforms: Where does that leave journalism?
Scientists at the Department of Energy's Oak Ridge National Laboratory have made a significant stride toward understanding a viable process for direct air capture, or DAC, of carbon dioxide from the atmosphere. This DAC process is in early development with the aim of achieving negative emissions, where the amount of carbon dioxide removed from the envelope of gases surrounding Earth exceeds the...
Can we sustainably harvest trees from tropical forests?
According to a recent survey by the News Media Association, 90% of editors in the United Kingdom "believe that Google and Meta pose an existential threat to journalism."
Study unveils shape-configurable MXene-based thermoacoustic loudspeakers with tunable sound directivity
Logging typically degrades tropical forests. But what if logging is carefully planned and carried out by well-trained workers?
Meteorites likely source of nitrogen for early Earth, Ryugu samples study finds
Recent research has led to the development of film-type shape-configurable speakers. These speakers, based on the unique properties of MXene, offer tunable sound directivity and hold immense promise for the rapidly growing field of wearable electronics. The study is published in Advanced Materials.
Harvesting more solar energy with two-dimensional supercrystals
Micrometeorites originating from icy celestial bodies in the outer solar system may be responsible for transporting nitrogen to the near-Earth region in the early days of our solar system. That discovery was published in Nature Astronomy by an international team of researchers, including University of Hawai'i at Mānoa scientists, led by Kyoto University.
Paleolithic humans may have understood the properties of rocks for making stone tools
When Emiliano Cortés goes hunting for sunlight, he doesn't use gigantic mirrors or sprawling solar farms. Quite the contrary, the professor of experimental physics and energy conversion at LMU dives into the nanocosmos.
Photonic chip that 'fits together like Lego' opens door to semiconductor industry
A research group led by the Nagoya University Museum and Graduate School of Environmental Studies in Japan has clarified differences in the physical characteristics of rocks used by early humans during the Paleolithic. They found that humans selected rock for a variety of reasons and not just because of how easy it was to break off. This suggests that early humans had the technical skill to...
Shedding light on the synthesis of sugars before the origin of life
Researchers at the University of Sydney Nano Institute have invented a compact silicon semiconductor chip that integrates electronics with photonic, or light, components. The new technology significantly expands radio-frequency (RF) bandwidth and the ability to accurately control information flowing through the unit.
Consensus needed on when global warming reaches 1.5°C, say scientists
Pentoses are essential carbohydrates in the metabolism of modern lifeforms, but their availability during early Earth is unclear since these molecules are unstable.
An anomalous relativistic emission arising from the intense interaction of lasers with plasma mirrors
Writing in the journal Nature ahead of COP28, a team of Met Office scientists has emphasized that—surprisingly—there is currently no formally agreed way of defining the current level of global warming relevant to the Paris Agreement.
Research on vital bat species emphasizes need for immediate conservation action
Interactions between intense laser pulses and plasma mirrors have been the focus of several recent physics studies due to the interesting effects they produce. Experiments have revealed that these interactions can generate a non-linear physical process known as high-order harmonics, characterized by the emission of extreme ultraviolet radiation (XUV) and brief flashes of laser light (i.e.,...
Making menstrual pads from succulents could improve access to sanitary products
Recent research led by Tigga Kingston, a professor in the Department of Biological Sciences at Texas Tech University, delivers a stark warning concerning the distressing decline of flying foxes and related species, also known as Large Old World Fruit Bats (LOWFBs).
A sun protection mechanism helps plants to survive
A method for producing a highly absorbent material from sisal (Agave sisalana)—a drought-tolerant succulent plant—is described in a study published in Communications Engineering. The authors suggest that, with further development, their method could be used to produce locally sourced disposable menstrual pads in rural and semi-arid regions.
Molecular rulers for high-resolution microscopy
Just as people can get sunburned, plants can also suffer from too much sunlight. To stay healthy, they use an internal "sun protection mechanism." Pierrick Bru, a Ph.D. student working with Alizée Malnoë at Umeå Plant Science Centre and Umeå University, has been studying a special component of this mechanism, called qH, and has found that it is quite adaptable.
With 80,000 attendees, COP28 is largest UN climate summit ever
There is good news for researchers working with high-resolution fluorescence microscopy: Biocompatible molecular rulers are available for the first time to calibrate the latest super-resolution microscopy methods.
Nature's palette reinvented: New fermentation breakthrough in sustainable food coloring
COP28 is officially the largest ever UN climate summit, with 80,000 participants registered on a list that—for the first time—shows who they work for.
Research explains why we lie when returning that unwanted holiday gift
Researchers from The Novo Nordisk Foundation Center for Biosustainability (DTU Biosustain) have developed an innovative fermentation process that produces natural betalain-type food colors. This groundbreaking technology is set to revolutionize the food color industry by offering a more sustainable and efficient alternative to traditional extraction methods.
Can science find a better way to trim a cat's nails?
It's an iconic episode of "Seinfeld"—Jerry tries to return a jacket and when asked why, he replies, "spite." In fact, he goes on to explain, he didn't care for the person who sold it to him.
University of California, Davis, researchers are working with the Sacramento SPCA to alleviate a near-universal source of stress for cats and those who care for them: nail trimming.