Researchers from China present a new framework to simulate how black hole images change over time, focusing on rotating regular black holes with nonsingular cores. Using spatio-temporal random fields and efficient light ray tracing, the model captures realistic brightness fluctuations, turbulence, and light-travel effects around the black hole. The simulated results reproduce time-varying features like the shifting bright ring seen in M87*, offering a fast, physically grounded alternative to full GRMHD simulations and paving the way for future dynamic black hole imaging studies.

Lithium-ion batteries and plastics are two of the most consumed products in modern society, yet their end-of-life disposal issues have become increasingly prominent: spent batteries contain toxic substances and cause resource waste, posing dual environmental risks; plastics, on the other hand, pose significant challenges to global recycling systems due to their massive volume and high chemical stability.

Now, researchers from Soochow University have jointly developed a novel dual-waste recycling strategy that can address both problems simultaneously. In a recent study published in Science Bulletin, they transformed spent lithium-ion batteries into catalysts for plastic recycling through an innovative dual-waste co-recycling strategy. This method not only enables high-value reuse of low-cost spent lithium manganese oxide (LMO) cathodes but also achieves efficient depolymerization of various polyesters. This research establishes a sustainable upcycling pathway for lithium-ion battery and plastic waste, providing a blueprint for large-scale circular economy.

Recent studies have established m6A RNA methylation, a fundamental epigenetic mechanism, as a pivotal driver of acute lung injury (ALI), a severe condition associated with mortality rates as high as 45%. This comprehensive review, published in the Journal of Intensive Medicine, elucidates the molecular mechanisms of m6A methylation and its associated proteins in ALI pathogenesis, potentially offering novel insights and therapeutic targets for ALI treatment.

Septic shock, a life-threatening complication of infection, has long been treated with rapid infusion of at least 30 mL/kg of intravenous fluids within three hours. But mounting evidence suggests this “one-size-fits-all” approach may harm some patients without benefiting others. An editorial by critical care specialists reviews the science and argues for individualized, dynamically reassessed fluid resuscitation instead of a rigid target. The piece reflects growing calls to update international guidelines.

A recent study published in National Science Review has introduced a policy-specific assessment framework featuring a novel Synergy Index, designed to uncover how air pollution control and carbon mitigation can move in harmony or fall out of step. Drawing on China’s on-road transportation sector as a case study, the research quantifies both the realized and untapped synergies in reducing greenhouse gases (GHGs) and improving air quality. The findings paint a compelling picture: from 2010 to 2020, China’s on-road transportation emission control policies achieved lower GHG emissions, cleaner air, and substantial public health benefits. However, behind this progress lies an unexpected finding showing that policy synergies have been weakening, highlighting the urgency of robust structural transitions to maintain long-term carbon and air-pollution co-control, to advance a sustainable pathway toward the Sustainable Development Goals, and to fullfil the newly announced NDC target.

A research team proposes a three-dimensional quantum anomalous Hall effect (3D QAHE) in Weyl semimetals (WSMs) by introducing Rashba spin-orbit coupling. This new state supports chiral surface and hinge states along different spatial directions, with Hall resistance switching between 0, h/e², and ±h/e², offering potential for energy-efficient devices and in-memory computing.

Writing in the journal National Science Review, researchers present a multichamber magnetic capsule robot for performing multiple tasks in the digestive tract. By applying external programming magnetic fields, its four independent chambers can be selectively opened, allowing for sampling bodily fluid or releasing drug at multiple sites or times via one-time oral intake. This design significantly improves patient comfort and procedural efficiency, demonstrating promising potential for clinical application.

A new review highlights major advances in bio-hydrovoltaic technology, marking a shift from traditional non-living materials to living biological systems that generate electricity through metabolic processes. This revolutionary energy approach offers self-regulation, environmental adaptability, and biodegradability, with strong potential in wearables, environmental monitoring, and distributed energy networks. Future directions include a “hydrovoltaic internet,” “hydrovoltaic intelligence,” and “hydrovoltaic ecology,” while key challenges remain in material stability, scalable manufacturing, and biosafety.

Under ultraviolet irradiation, water molecules can generate highly oxidative hydroxyl radicals (Ultraviolet-water/UV-W), which can scissor polymer chains. The study results reveal that by first introducing water passages into the polymer membrane and subsequently applying the UV-W process, tunable angstrom-sized channels can be created, enabling precise ion sieving.

Polycystic ovary syndrome (PCOS) is a common gynecological disease that affects women of reproductive age and is characterized by hyperandrogenism, ovulatory dysfunction, and polycystic changes in the ovaries. In recent years, along with irregular menstruation and infertility, metabolic abnormalities associated with PCOS have garnered increasing attention. Insulin resistance is the most prevalent metabolic abnormality in patients with PCOS and is closely related to disease progression and severity.