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Hammerhead is a compact high-voltage vacuum bushing designed, simulated, and tested to 330 kV. It significantly increases voltage holdoff per volume compared to other designs and operates stably at 300 kV with leakage current below 10 μA without requiring ultra-high vacuum or polishing.

Almost two hundred years ago Thomas Jefferson was alleged to have fathered children by his slave Sally Hemings. The charges have remained controversial. Now, DNA analysis confirms that Jefferson was indeed the father of at least one of Hemings' children.

Transition from coal to gas, retrofitting and retirement of coal power plants are expected to reduce air pollution and therefore have positive health effects. Casey et al. present direct evidence of this phenomenon by reporting improved asthma outcomes in the wake of coal plant closure and retrofit in Louisville, Kentucky.

Estimates from the Global Burden of Disease study reveal declines in chronic respiratory disease mortality between 1990 and 2023—especially during the COVID-19 pandemic—but the burdens on people affected remain substantial.

Global Burden of Disease estimates show that between 1990 and 2023, the prevalence and burden of drug use disorders, inclusive of amphetamine, cannabis, cocaine and opioid use, have been increasing in high-income countries, particularly in the USA.

A magnetic-spectrometer-free method for electron–proton scattering data reveals a proton charge radius 2.7 standard deviations smaller than the currently accepted value from electron–proton scattering, yet consistent with other recent experiments.

Ribas and colleagues report the results of a phase 2 clinical trial of neoadjuvant PD-1 blockade in patients with surgically resectable desmoplastic melanoma.

Lipid nanoparticle based mRNA vaccines are known to induce robust CD4 + T cell responses. Here the authors establish a role of endogenously derived antigen processing in the optimal priming of CD4 + T cell responses to mRNA lipid nanoparticle vaccines.

In this study, the authors show that low levels of VDAC2 and Bak in hepatocyte mitochondria make them resistant to cell death induced by truncated Bid (tBid), while increased VDAC2 and Bak in liver cancer cells allow specific targeting by combinations of tBid activators and Mcl-1 inhibitors.

Measurements of the proton’s electromagnetic structure show enhancement of its electric generalized polarizability compared with theoretical expectations, confirming the presence of a new dynamical mechanism not accounted for by current theories.

Environmental factors such as diet have been shown to be involved with the development of colitis. Here the authors show that L-tryptophan promotes the development of GPR15⁺ Treg cells via the host IDO1/2 pathway and that tryptophan consumption in mice reduces severity of colitis in a C. rodentium mouse model.

Tropical forests regulate Earth’s carbon cycle, but what governs carbon sequestration following land use remains unclear. Here Tang et al find a shift from strong nitrogen limitation to no nutrient limitation over tropical forest secondary succession.

Measurements of the proton’s spin structure in experiments scattering a polarized electron beam off polarized protons in regions of low momentum transfer squared test predictions from chiral effective field theory of the strong interaction.

Electron scattering measurements are shown to reproduce only qualitatively state-of-the-art lepton–nucleus energy reconstruction models, indicating that improvements to these particle-interaction models are required to ensure the accuracy of future high-precision neutrino oscillation experiments.

Federated learning (FL) algorithms have emerged as a promising solution to train models for healthcare imaging across institutions while preserving privacy. Here, the authors describe the Federated Tumor Segmentation (FeTS) challenge for the decentralised benchmarking of FL algorithms and evaluation of Healthcare AI algorithm generalizability in real-world cancer imaging datasets.

FAN1 nuclease removes DNA triplet repeat loops by a process that requires PCNA. Using cryo-EM, the authors elucidate this mechanism, and show that a Huntington’s disease modifying R507H mutation inactivates FAN1 by compromising the FAN1-PCNA complex.

The molecular etiology of hypertensive disorders of pregnancy is largely unknown. Here the authors show from a prospective study of diverse pregnancies that the disease can be split into molecular subtypes based on RNA data and validated a classifier for individuals with no preexisting high risk factors.

There is currently no approved vaccine for Lassa fever virus (LASV). Here, Abreu-Mota et al. develop an inactivated, adjuvanted vaccine candidate expressing LASV glycoprotein (GPC) in a rabies virus vector, and show that non-neutralizing LASV GPC-specific antibodies are a major mechanism of protection.

The internal structure of the neutron has now been probed by highly energetic photons scattering off it. Combined with previous results for protons, these measurements reveal the contributions of quark flavours to the nucleon structure.

The serine/threonine kinase WNK1 is an inhibitor of chloride efflux. Here the authors show that this inhibition is a means of negatively regulating the activation of the NLRP3 inflammasome in macrophages, leading to reduced inflammatory responses.

Hybrid gRNAs significantly increase targeted editing in the liver while simultaneously reducing unwanted bystander editing in humanized mouse models.

Chronic care manages long-term, progressive conditions, while acute care handles short-term ones. Here, authors show chronic conditions account for most of the global health burden, with 68% of DALYs and 93% of YLDs attributed to chronic care needs.

Cryptochrome 1 (CRY1) is a transcriptional coregulator associated with the circadian clock. Here the authors reveal that CRY1 is hormone-regulated, stabilized by genomic insult, and promotes DNA repair and cell survival through temporal transcriptional regulation.

Cheap colliders probe debris for hint of ‘heavy’ photon.

A high-precision parity-violating electron–quark scattering experiment provides measurements of a combination of electron–quark weak couplings with a precision five times higher than the single previous direct study, confirming the predictions of the electroweak particle-physics theory and providing constraints on parity-violating interactions beyond the standard model.

The gluonic gravitational form factor of the proton was determined using various models, and these analyses showed that the mass radius of the proton was smaller than the electric charge radius.

The genetic basis of sex differences in Alzheimer’s disease (AD) is not well characterized. Here, authors report 2,320 sex-specific gene associations with 3 AD endophenotypes using bulk RNAseq data from 3 brain regions in ROS/MAP.

Simultaneous high-precision measurements of the EMC effect and short-range correlated abundances for several nuclei reveal a universal modification of the structure of nucleons in short-range correlated neutron–proton pairs.

High-energy electron scattering that can isolate pairs of nucleons in high-momentum configurations reveals a transition to spin-independent scalar forces at small separation distances, supporting the use of point-like nucleon models to describe dense nuclear systems.

It remains a challenge to find the structure and the distribution of the constituents of nucleons. Here the authors use a scattering method to get information about the gluons and quarks inside a proton and separate the contribution of Bethe-Heitler from the deeply virtual Compton scattering process.

Adjuvants are an important component of modern vaccines. Here, the authors employ a phenotypic screen of ~200k compounds and identify PVP-057, a TLR3 agonist with a simple scalable 3-step synthesis, as an adjuvant that induces durable humoral and cellular immunity to varicella-zoster virus (VZV) gE in mice.

Qasim et al. describe neurons in the human entorhinal cortex that activate near the locations in space that a person is cued to recall during a memory task. These results show one way in which the cognitive map shifts according to memory demands.

Programmed cell death regulates early development but how various factors (for example, TRADD, FADD and RIPKs) regulate this is unclear. Here, the authors show that a single allele of Tradd is essential for survival, when both Ripk3 and Ripk1 are knocked out in mice, and RIPK1 protects thymocytes from TNF-induced apoptosis.

Population mobility is associated with SARS-CoV-2 transmission but its impacts on other respiratory viruses are not well understood. Here, the authors investigate associations between mobile phone-derived mobility metrics and the dynamics of 18 respiratory viruses in Seattle, Washington from 2018 to 2022.

CLPB is a protein disaggregase that has been linked to human disease. Here, the authors show that in different models of chronic or acute loss of the mitochondrial disaggregase, mitochondrial Ca²⁺ handling and fusion dynamics are impaired, revealing their dependence on CLPB.

Spotiphy (spot imager with pseudo-single-cell-resolution histology) is a computational toolkit that transforms sequencing-based spatially resolved transcriptomics data into whole-transcriptome images with single-cell resolution.

Forest restoration in LMICs can contribute to global C mitigation targets. Here, the authors assess the economic feasibility of forest restoration methods in Panama, i.e. natural regeneration, native species plantings, and enrichment planting, showing that not all methods are economically viable.