The red supergiant Betelgeuse likely has a companion star, astronomers have confirmed.
Long theorized to share an orbit with Betelgeuse — an extremely bright star that may go supernova in the next few thousand years — a sun-size companion star has finally appeared in unique observations taken with the Gemini North telescope high on Hawaii’s Mauna Kea.
An academic whose work reaches beyond the Ivory Tower is rare. Scholarly writing tends to be highly technical, filled with footnotes and references, and often lacks a compelling narrative to captivate the reader. Not to mention that the work itself is usually deemed irrelevant and impractical for public knowledge.
The American philosopher Daniel Dennett (1942−2024) was, without a doubt, one of these generational thinkers who transcended the academic box. Why? His writing is filled with clear and interesting thought experiments, allowing anyone to grasp his theories, which span from philosophy, cognitive science and evolutionary biology to farming, sailing, and religion. Any curious person can find a relevant topic relating to their life in Dennett’s vast body of work, and it will likely have them questioning whether they actually understood the topic in the first place.
To celebrate the life and work of Dennett, the aptly named Dennett Prize was introduced in 2024. Like Dennett, the winner should “challenge received ideas and introduce new perspectives.” The prize is presented as part of the International Center for Consciousness Studies (ICCS) annual conference, held this year in Heraklion, Crete, earlier this month. The inaugural winner of the Dennett Prize was given to Andy Clark, professor of cognitive philosophy at the University of Sussex.
Researchers at the University of California, Irvine have discovered a new state of quantum matter. The state exists within a material that the team reports could lead to a new era of self-charging computers and ones capable of withstanding the challenges of deep space travel.
“It’s a new phase of matter, similar to how water can exist as liquid, ice or vapor,” said Luis A. Jauregui, professor of physics & astronomy at UC Irvine and corresponding author of the new paper in Physical Review Letters.
“It’s only been theoretically predicted—no one has ever measured it until now.”
New research into topological phases of matter may spur advances in innovative quantum devices. As described in a new paper published in the journal Nature Communications, a research team including Los Alamos National Laboratory scientists used a novel strain engineering approach to convert the material hafnium pentatelluride (HfTe5) to a strong topological insulator phase, increasing its bulk electrical resistance while lowering it at the surface, a key to unlocking its quantum potential.
“I’m excited that our team was able to show that the elusive and much-sought-after topological surface states can be made to become a predominant electrical conduction pathway,” said Michael Pettes, scientist with the Center for Integrated Nanotechnologies (CINT) at the Laboratory.
“This is promising for the development of types of quantum optoelectronic devices, dark matter detectors and topologically protected devices such as quantum computers. And the methodology we demonstrate is compatible for experimentation on other quantum materials.”
Natural nanoparticles have been found to exist in traditional Chinese medicine (TCM) decoctions. However, whether natural nanoparticles can influence the oral bioavailability of active compounds has not been elucidated. Using Xie-Bai-San decoction (XBSD) as an example, the purpose of this study was to isolate, characterize and elucidate the mechanism of the nanoparticles (N-XBSD) in XBSD, and further to explore whether the bioavailability of the main active compounds could be enhanced by N-XBSD.
N-XBSD were isolated from XBSD, and investigated its characterization and study of its formation mechanism, and evaluation of its ability to enhance bioavailability of active compounds.
The N-XBSD was successfully isolated with the average particle size of 104.53 nm, PDI of 0.27 and zeta potential of −5.14 mV. Meanwhile, all the eight active compounds were most presented in N-XBSD. Kukoamine B could self-assemble with mulberroside A or liquiritin to form nanoparticles, respectively. And the FT-IR and HRMS results indicated the possible binding of the ammonium group of kukoamine B with the phenolic hydroxyl group of mulberroside A or liquiritin, respectively. The established UPLC-MS/MS method was accurate and reliable and met the quantitative requirements. The pharmacokinetic behaviors of the N-XBSD and decoction were similar in rats. Most notably, compared to that of free drugs, the Cmax, AUC0-∞, AUC0-t, T1/2 and MRT0-∞ values of index compounds were the higher in N-XBSD, with a slower plasma clearance rate in rats.
The Chinese military is building sophisticated biological weapons and small-scale electronic tools made with nanotechnology that could be used in covert warfare, a major study warns.
“China’s invisible arsenals encompass a range of advanced weaponry that are distinctly focused on providing the Chinese Communist Party with a range of asymmetric warfare options, including the delivery of biological, biochemical and neurobiological weapons on target populations,” according to a report by three open-source intelligence analysts.
The People’s Liberation Army, or PLA, is developing nanoweapons using highly sophisticated microscopic materials that enhance the effects of biological weapons, according to the report, titled “In the Shadows of Science: Unravelling China’s Invisible Arsenals of Nanoweapons.” It was made public earlier this month.