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Dominant contribution of Asgard archaea to eukaryogenesis

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09960-6

A survey of the reconstructed gene set of the last eukaryotic common ancestor shows a consistent link between Asgard archaea and the origin of numerous, functionally diverse eukaryotic genes, demonstrating the dominant Asgard contribution to eukaryogenesis.

Microbiota-induced T cell plasticity enables immune-mediated tumour control

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09913-z

Molecular mimicry between a gut commensal and a tumour antigen forms part of an important mechanistic framework that can boost the efficacy of immune checkpoint blockade therapy and restrain tumour growth.

Exciplex-enabled high-efficiency, fully stretchable OLEDs

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09904-0

Fabrication of fully stretchable organic light-emitting diodes incorporating an intrinsically stretchable exciplex-assisted phosphorescent layer along with MXene-contact stretchable electrodes is described, demonstrating high efficiency and mechanical compliance for applications in next-generation wearable and deformable displays.

3D-printed low-voltage-driven ciliary hydrogel microactuators

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09944-6

3D-printed gel microcilia arrays printed by two-photon polymerization and composed of a soft acrylic acid-co-acrylamide hydrogel with a nanometre-scale network structure are shown to respond to low-voltage electrical stimuli within milliseconds, enabling dynamic individual control and non-reciprocal 3D motion.

Disease tolerance and infection pathogenesis age-related tradeoffs in mice

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09923-x

Disease course and pathology an infection may cause can change owing to the structural and functional physiological changes that accumulate with age, but therapy can be tailored accordingly; disease tolerance genes show antagonistic pleiotropy.

Enriching African genome representation through the AGenDA project

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09935-7

The Assessing Genetic Diversity in Africa (AGenDA) project shares their processes, including community engagement, obtaining ethics approvals, navigating legal compliance and developing a common governance framework.

Trapping of single atoms in metasurface optical tweezer arrays

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09961-5

Single strontium atoms are trapped in optical tweezer arrays generated via holographic metasurfaces, overcoming a critical barrier to realizing scalable neutral-atom quantum technologies.

The ubiquitin ligase KLHL6 drives resistance to CD8<sup>+</sup> T cell dysfunction

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09926-8

Integrating computational analyses of T cell exhaustion and mitochondrial fitness atlases with in vivo CRISPR screens has identified KLHL6 as a dual-negative regulator of both exhaustion differentiation and mitochondrial dysfunction, highlighting its potential as a target to enhance anti-tumour immunity.

Predictive coding of reward in the hippocampus

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09958-0

Calcium imaging of mouse hippocampal neurons while mice learn a reward-based task over several weeks provides insight into the evolution of the hippocampal reward representation during extended periods of experience.

Artificial intelligence tools expand scientists’ impact but contract science’s focus

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09922-y

Artificial intelligence boosts individual scientists’ output, citations and career progression, but collectively narrows research diversity and reduces collaboration, concentrating work in data-rich areas and potentially limiting broader scientific exploration.

Sub-zero Celsius elastocaloric cooling via low-transition-temperature alloys

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09946-4

A compression-based, regenerative elastocaloric cooling device using low-transition-temperature tubular NiTi units in a cascaded configuration, which show superelasticity and substantial entropy changes, allows the construction of a sub-zero Celsius refrigeration system without refrigerant gases.

Polyamine-dependent metabolic shielding regulates alternative splicing

Nature, Published online: 14 January 2026; doi:10.1038/s41586-025-09965-1

Polyamines prevent the action of kinases on acidic phosphorylatable motifs in spliceosomal proteins, thus providing a mechanism for metabolite-mediated regulation of alternative splicing in cells.

Stretchy organic LED devices with an ‘exciplex’ state are highly efficient

Nature, Published online: 14 January 2026; doi:10.1038/d41586-025-04164-4

Fully stretchable organic light-emitting diodes (OLEDs) have been limited by poor efficiency, in part because their elastic-polymer components hinder the harvesting of ‘triplet-state’ quasiparticles that can be converted into light-emitting states. Fully stretchable OLEDs with unprecedented efficiencies have been developed that recycle triplets in an elastomer-tolerant manner.

Biosensors characterize the routes taken by receptors to different active states

Nature, Published online: 14 January 2026; doi:10.1038/d41586-026-00011-2

A panel of fluorescently labelled G-protein-coupled-receptor proteins expressed in living cells has confirmed that, when bound by an activating ligand molecule, these receptors form different complexes with their G proteins. The activation trajectories induced by different ligands explain ligand-specific efficacies of G-protein activation and preferences for G-protein subtypes.

Memories of items and their contexts are encoded by separate groups of human brain cells

Nature, Published online: 14 January 2026; doi:10.1038/d41586-026-00016-x

Human memory often needs to link specific items to the situation in which they feature. Brain recordings reveal that two distinct groups of neurons respond to stimuli and contextual information. These groups then cooperate to form flexible memories, rather than individual neurons encoding both signal types.

Daily briefing: Same-sex sex is a normal part of some primates’ lives

Nature, Published online: 13 January 2026; doi:10.1038/d41586-026-00149-z

Same-sex sexual behaviour could help some primates cope with complex social hierarchies. Plus, new clues as to where birds came from and the US Environmental Protection Agency will stop including human health in cost–benefit analyses.
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