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A new artificial intelligence model, DeepSeek-R1, is introduced, demonstrating that the reasoning abilities of large language models can be incentivized through pure reinforcement learning, removing the need for human-annotated demonstrations.

In this Perspective, members of the Aging Biomarker Consortium outline the X-Age Project, an Aging Biomarker Consortium plan for building standardized aging clocks in China. The authors discuss the project roadmap and its aims of decoding aging heterogeneity, detecting accelerated aging early and evaluating geroprotective interventions.

An understanding of the molecular mechanisms promoting the generation of immunoregulatory and tumour-promoting monocytes and macrophages is key to breaking the cycle of tumour myelopoiesis and developing more effective myeloid-targeting therapies.

In this study, Weber et al., investigate the long-term survival and integration of human stem cell-derived neural progenitors into the stroke-injured mouse brains. They report grafted cells integrate into host circuits and mediate repair through graft-host crosstalk via neurexin, neuregulin, neural cell adhesion molecules, and SLIT signalling pathways.

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.

Finite momentum superconducting pairing refers to a class of unconventional superconducting states where Cooper pairs acquire a non-zero momentum. Here the authors report a new superconducting state in bulk 4Hb-TaS₂, where magnetic fields induce finite momentum pairing via magnetoelectric coupling.

The quark structure of the f₀(980) hadron is still unknown after 50 years of its discovery. Here, the CMS Collaboration reports a measurement of the elliptic flow of the f₀(980) state in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of 8.16 TeV, providing strong evidence that the state is an ordinary meson.

Whether the adult testis harbours a somatic progenitor population is unknown. Here, the authors provide evidence that the testis interstitial cells expressing the transcription factor Tcf21 maintain adult testis homeostasis during aging, and act as potential reserve somatic progenitors following injury.

A Telluride Science Workshop on electrochemical separations was convened in early 2025. In this Feature, 17 of the workshop participants share their perspectives and future outlooks on this rapidly growing research area.

A lipid nanoparticle is used to deliver mRNA to hematopoietic stem cells in macaques.

Toghani, Gupte et al. identify semaphorin 4A as a cell-extrinsic factor that protects myeloid-biased hematopoietic stem cells from inflammaging, mainly produced by their progeny—neutrophils—and acting via a negative feedback loop.

Artificial intelligence-based detection of gastric cancer at different stages from noncontrast computed tomography is suggested to be feasible in a retrospective analysis of large and diverse cohorts, including real-world populations in opportunistic and targeted screening scenarios.

Itkin et al. identify a role for Fli-1 in hematopoietic stem cell activation during regenerative hematopoiesis. They show that Fli-1 coordinates hematopoietic stem cells to stimulate niche-derived Notch1 feedback signals for demand-needed hematopoietic cell output.

Whilst superconductivity usually appears when magnetic order is suppressed, the role of charge is less known. Here, Kawasaki et al. report a charge density wave (CDW) above the superconducting transition induced by an in-plane magnetic field in Bi₂Sr_2-x La _x CuO₆, with the CDW onset temperature scaling with the pseudogap temperature.

The authors present SVclone, a computational method for inferring the cancer cell fraction of structural variants from whole-genome sequencing data.

Using voltage imaging, the authors show that interneurons in the hippocampus sharpen memory-encoding-activity by increasing the signal-to-noise ratio of pyramidal neuron sensory representations during working memory in mice.

A parallel experimental and computational approach was used to predict and prepare intercalated, layered hybrid perovskites, highlighting the breadth and flexibility of intercalation.

The proton shuttle plays a critical role in the proton transfer process during lithium-mediated ammonia synthesis. Here, the authors establish the structure-activity relationship and design principles for effective proton shuttles.

MRI data from more than 100 studies have been aggregated to yield new insights about brain development and ageing, and create an interactive open resource for comparison of brain structures throughout the human lifespan, including those associated with neurological and psychiatric disorders.

A system that undergoes a phase transition at absolute zero is said to exhibit a quantum critical point. Zhou et al. identify the signatures of not one but two quantum critical points in the finite-temperature characteristics of an iron-based superconductor.

The realization of high-performance flexible perovskite/crystalline-silicon tandem solar cells requires efficient photocarrier transport and mitigation of residual stress. Here, authors reveal the critical role of perovskite phase homogeneity, achieving flexible devices with efficiency of 29.88%.

A clinical study of women with abnormal breast mammograms establishes a workflow to evaluate the capability of breast photoacoustic computed tomography in the classification, monitoring and segmentation of lesions.

Centrioles organize chromosome segregation, migration, and the immune synapse. Here, Schapfl et al. show that B cell progenitors tolerate centriole overamplification, but not loss, while mature B cells can mount a humoral immune response in their absence.

The transcription factor CREM is a pivotal regulator of NK cell function, making CREM a valuable target to increase the efficacy of anticancer immunotherapies based on this cell population and chimeric antigen receptors.

While Bell inequalities have been violated several times—mostly in photonic systems—their violations within particle physics experiments are less explored. Here, the BESIII Collaboration showcases Bell-violating nonlocal correlations between entangled hyperon pairs.

The LHCb experiment at CERN has observed significant asymmetries between the decay rates of the beauty baryon and its CP-conjugated antibaryon, thus demonstrating CP violation in baryon decays.

Together with an accompanying paper presenting a transcriptomic atlas of the mouse lemur, interrogation of the atlas provides a rich body of data to support the use of the organism as a model for primate biology and health.

Wang et al. present E3-CryoFold, a deep learning method for cryo-EM structure determination that enables end-to-end training and one-shot inference This method reduces inference times while boosting template modelling scores against comparable methods.

Integrative analyses of transcriptome and whole-genome sequencing data for 1,188 tumours across 27 types of cancer are used to provide a comprehensive catalogue of RNA-level alterations in cancer.

An adversarial domain translation framework is presented for scalable integration of single-cell atlases across samples, technical platforms, data modalities and species.

Parametric phase-locked oscillators were first developed in the 1950s as a way of electrically storing and controlling information. Lin et al.now show that a modern version of this concept using superconducting circuits enables high-fidelity, single-shot and non-destructive measurement of a qubit.

Here, the authors show that van der Waals isotopic heterostructures based on few-layer h¹⁰BN and h¹¹BN can be tuned to modulate the energy-momentum dispersions of hyperbolic phonon polaritons, offering an alternative approach to engineer the nanophotonic properties of 2D materials.

Haematopoietic stem cells (HSCs) are very sensitive to energetic and oxidative stress, and modulation of the balance between their quiescence and proliferation is needed to respond to metabolic stress while preserving HSCs' long term regenerative capacity. Here the tumour suppressor Lkb1 is shown to have a crucial role in maintaining energy homeostasis in haematopoietic cells — an effect largely independent of AMPK and mTOR signalling.

The stoichiometric photoreaction of CO₂ with H₂O is one of the big challenges in photocatalysis. An artificial photosynthetic system based on a direct and indirect Z-scheme heterostructure is synthesised, enabling simultaneous CO₂ reduction to HCOOH and H₂O oxidation to O₂.

Investigating the inner structure of baryons is important to further our understanding of the strong interaction. Here, the BESIII Collaboration extracts the absolute value of the ratio of the electric to magnetic form factors and its relative phase for e + e − → J/ψ → ΛΣ decays, enhancing the signal thanks to the vacuum polarisation effect at the J/ψ peak.

The ATLAS Collaboration reports the observation of the electroweak production of two jets and a Z-boson pair. This process is related to vector-boson scattering and allows the nature of electroweak symmetry breaking to be probed.

Knock-in mice conditionally or constitutively expressing Cas12 variants enable a wide range of ex vivo and in vivo applications requiring multiplexed genome engineering.

Circularly polarized light is unexpectedly detected in the afterglow of γ-ray burst GRB 121024A measured 0.15 days after the burst, and is shown to be intrinsic to the afterglow and unlikely to be produced by dust scattering or plasma propagation effects.

Genome-wide analyses in over one million self-reported cases and controls identify genetic variants associated with stuttering and find genetic correlations with autism, depression and impaired musical rhythm, supporting a potential neurological basis for stuttering.

Quark–antiquark annihilation measurements provide a precise determination of the ratio of down and up antiquarks within protons as a function of momentum, which confirms the asymmetry between the abundance of down and up antiquarks.

The ATLAS experiment at the Large Hadron Collider reports a search for charged-lepton-flavour violation in decays of Z bosons into a τ lepton and an electron or muon of opposite charge.

Using multi-ancestry genome-wide association study and fine-mapping, 298 loci and 36 credible genes are identified in the aetiology of bipolar disorder.

Dnmt3a mutations in mouse haematopoietic stem and progenitor cells equivalent to R882 mutations in human cause increased mitochondrial respiration, suggesting that this is a mechanism of clonal haematopoiesis and a potential therapeutic target.

A competitive-chemical-reaction-based growth mechanism by controlling the kinetic parameters can easily realize the growth of transition metal chalcogenides and transition metal phosphorous chalcogenides with different compositions and phases.

The semileptonic decay channels of the Λc baryon can give important insights into weak interaction, but decay into a neutron, positron and electron neutrino has not been reported so far, due to difficulties in the final products’ identification. Here, the BESIII Collaboration reports its observation in e+e- collision data, exploiting machine-learning-based identification techniques.

Oh and colleagues demonstrate that the DUSP6–RSK1 axis is involved in the transformation of myeloproliferative neoplasms to secondary acute myeloid leukemia and that DUSP6 mediates the response to JAK2 inhibition.

Hyperbolic polaritons provide unprecedented control over light-matter interaction at extreme nanoscales. Here, the authors propose type-I hyperbolic metasurfaces supporting highly-squeezed magnetic designer polaritons with negative group velocity, which are magnetic analogs of hyperbolic polaritons in hexagonal boron nitride.

Catalyst screening is an important process but it’s usually time-consuming and labor intensive. Here the authors report the prediction of oxygen vacancy for perovskites using machine learning techniques to develop suitable oxygen electrocatalysts for solid oxide fuel cells at reduced temperatures.