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The standard method for identifying active brown adipose tissue is costly and exposes patients to radiation. Here, the authors show that convolutional neural networks can predict [¹⁸F]-FDG uptake by BAT from unenhanced CT scans and improve the segmentation accuracy compared to conventional CT thresholding.

An Earth-mass planet is found to have a white dwarf host—the final evolutionary stage of Sun-like stars. This system suggests that terrestrial planets in Earth-like orbits may avoid being engulfed during the red-giant phases of their host stars.

Using cryo-EM, the authors identified 42 MIPs, including outer junction protein CFAP77 and outer dense fibers, in native doublet microtubules of Tetrahymena thermophila. Knockout of CFAP77 reduced ciliary beat frequency and led to outer junction damage.

Analysis of the cool brown dwarf Gliese 229 B suggests that it is actually a close binary of two less massive brown dwarfs, explaining its low luminosity and settling the conflict between theoretical predictions and measurements.

A pragmatic, cluster randomized trial in rural Guangdong, China, showed that 12-month implementation of a comprehensive antibiotic stewardship program involving physician training, point-of-care prompts, monthly peer review feedback and smartphone-based patient education substantially reduced antibiotic prescriptions for acute respiratory infections compared to control consultations.

Reconstructing microbial genomes from 820 reef-building corals collected at 99 reefs across 32 islands throughout the Pacific Ocean highlights the importance of conserving coral reefs as vital reservoirs of molecular diversity.

Brown adipose tissue (BAT) in infants has been studied for more than a century, however, the knowledge about its physiological features is limited. Here, the authors investigate the link between BAT thermogenesis and the regulation of temperature in human new-borns with non-invasive infrared thermography.

The bacterial genus Aeromonas includes emerging human pathogens, often misidentified as Vibrio cholerae. Here, the authors analyse genomic sequences of over 1,800 Aeromonas isolates, showing that clinical and environmental strains do not display clear differences in drug resistance or disease-causing potential.

Lampreys are jawless vertebrates that can offer unique insights into vertebrate evolution. Here they generate a comprehensive cell atlas of the lamprey, uncovering 70 distinct cell types across 14 tissues, and identify pancreas-like cells in the lamprey small intestine.

Sequencing of marine sediments finds 136 newly identified Heimdallarchaeia and several novel lineages, and indicates that Heimdallarchaeia evolved distinct metabolic capabilities from other Asgardarchaeota, in conditions that may have given rise to early eukaryotes.

Using two newly developed immunoassays tested in three clinical cohorts, this study highlights CSF DOPA decarboxylase as a promising biomarker for differentiating dementia with Lewy bodies and Parkinson’s disease from Alzheimer’s disease and controls.

Chlorpyrifos is a widely-used pesticide and a common residue on vegetables and fruits. Here the authors show that at non-neurotoxic doses, chlorpyrifos reduces energy expenditure, by inhibiting diet induced thermogenesis, and promotes obesity and insulin resistance.

The isolation of catenated nitrogen compounds is difficult, in part because these chains can readily lose nitrogen, creating a strong thermodynamic push towards decomposition. Now, a series of molecules containing radical anions of four-atom nitrogen chains have been synthesized and studied under ambient conditions; the chain can cleave into N1 and N3 fragments, and can act as a source of nitrene radical anion.

Sclerostin impairs whole-body lipidandglucosemetabolism. Here, the authors further demonstrate that adipocytic sclerostin loop3-LRP4 interactionparticipatesin the impairment effect of sclerostin on whole-body lipid and glucose metabolism.

During cold exposure, activated brown adipose tissue takes up a large amount of circulating glucose to fuel thermogenesis. Here, the authors show that cold stress enhances the packaging of miR-378a-3p into BAT-derived EVs, which are delivered to the liver and consequently stimulates gluconeogenesis.

Brown adipose tissue (BAT) produces heat by burning lipid triglycerides. Here, Berbée et al. show that pharmacological BAT activation protects hyperlipidemic mice from atherosclerosis, provided mice retain the metabolic capacity to clear cholesterol-enriched lipoprotein remnants by the liver.

Wide-field quantum sensing shows μm-scale inhomogeneous superconductivity in high-pressure La₃Ni₂O₇, linking local diamagnetic response to stress and stoichiometry and clarifying mechanisms that suppress or enhance superconductivity.

β-Adrenergic signaling is a core regulator of brown adipocyte function. Here, the authors provide unbiased insight into the transcriptional network controlled by lipolysis in brown adipocytes, showing that lipolysis is required for much of the thermogenic gene program activated by β-adrenergic signals.

Shi et al. show that neuregulin-4 derived from brown adipose tissue can reduce endothelial injury and inflammation and alleviate atherosclerosis in male mice, via Akt and nuclear factor-κB signaling

Electron transfer in molecular wires is typically dominated by tunnelling at short lengths. Now it is shown that conjugated molecular wires anchored to indium tin oxide electrodes exhibit a hopping mechanism even at 1-nm lengths, enabling charge extraction in tin perovskite solar cells and improved device performance.

Brown adipose tissue activation of thermogenesis is accompanied by a sequence of events commonly associated with apoptosis, however they evade cell death. Assali et al. show that NCLX prevents mitochondrial calcium overload and apoptosis. Deletion of NCLX, converts a thermogenic signal into a death pathway.

Atmospheric short-wave absorption due to wildfire smoke is caused predominantly by dark brown carbon particles, according to observations from smoke plumes in the United States.

Mild cold exposure activates a substantial amount of brown adipose tissue (BAT) in a patient with cancer, reducing tumour-associated glucose uptake, and activation of BAT in mice inhibits the growth of tumours by decreasing blood glucose and impeding glycolysis-based metabolism in cancer cells.

Beta3-adrenergic receptor (b3-AR) signaling in response to cold activates adipose tissue thermogenesis. Here the authors identify the transcription factor FoxP1 as a direct negative regulator of b3-AR expression and show that loss of FoxP1 leads to enhanced development of thermogenic adipose tissue.

Targeting neurons that regulate energy balance may offer new approaches for obesity treatment. Here, authors show that chemogenetic and pharmacological manipulation of GABAergic neurons in the DRN/vlPAG increases adaptive thermogenesis and reduces weight gain in mice fed a highfat diet.

Exploration of the chemistry of allylic, benzylic, propargylic and allenylic oxonium ions is lacking despite the latest developments in onium ion chemistry. Now, a unified approach for the synthesis and NMR spectroscopic characterization of these unusual species is reported, helping to understand their reactivity.

Cryo-electron microscopy structures of nucleotide excision repair complexes reveal the roles of the constituent proteins XPA, XPB, XPC, XPD, XPF, XPG and RPA in DNA bubble formation and excision of the lesion strand.

Methane emission from a very cool brown dwarf, perhaps arising from an aurora, has been detected in James Webb Space Telescope observations.

Crystal structures of HIV Env trimer with native glycosylation in complex with neutralizing antibodies reveal a glycan shield of high-mannose and complex-type N-glycan and indicate a path for germline-targeting vaccine design.

Engineered mucus-tethering bispecific nanobodies neutralize and entrap viruses to enhance mucosal immunity, preventing influenza infection and limiting SARS-CoV-2 transmission.

Snow droughts are periods of unusually low snowpack driven by warming winters and reduced snowfall in regions that rely on snow. This study shows that the frequency of snow drought events increased by 5.3–6.7% per decade from 1960 to 2020 in global winter wheat croplands, and that winter wheat yield sensitivity to snow droughts has intensified in 25% of Northern Hemisphere croplands.

Sugimoto et al. show that maresin 2, a specialized pro-resolving mediator that is secreted from brown adipose tissue upon cold exposure, contributes to amelioration of obesity-induced inflammation.

mTORC2 activates Akt, a regulator of cell growth and metabolism, however, the role of mTORC2 in adipocytes is incompletely understood. Here the authors report that a mTORC2-Akt axis specifically activates ACLY to promote lipid synthesis and histone acetylation during brown adipocyte differentiation.

Proxy records from Lake Baikal show that rapid cooling coincided with Northern Hemisphere ice sheet expansion 2.7 million years ago, a change accompanied by a transition to open steppe ecosystems.

Protein-activity-based identification of hypermorphic, hypomorphic, neomorphic effectors and therapeutically relevant mutations uses transcriptomic data to categorize variants of unknown significance into hypermorphic, hypomorphic and neomorphic mutations based on their effects on transcription factor activity and subsequent gene expression.

Using infant fMRI, the authors show that, by 2 months of age, representations in high-level visual cortex encode visual categories that align with deep neural networks, and lateral object-selective regions are later to develop.

The enzyme soluble guanylyl cyclase (sGC) regulates differentiation of brown fat. Here, Hoffman et al.show that a small molecule sGC stimulator increases brown fat activity and browning of white fat, thereby inducing energy expenditure, weight loss and partial protection from diet-induced obesity in mice.

How heavy a person is and how much active brown fat they have depends on their father and the season in which they were conceived.

Spleen protein tyrosine kinase (Syk) has so far been mainly studied in haematopoietic and immune cells. Here, the authors show that Syk also has a role in brown adipose tissue, where it regulates the formation of brown adipocytes and their thermogenic activation in response to β-adrenergic stimulation.

Analysis of the atmospheric H₂ variability over the past millennium suggests that the sensitivity of H₂ to climate change should be considered in estimates of the radiative consequences of rising anthropogenic H₂ emissions.

The ZFTA–RELA fusion, an oncogene for ependymomas, promotes the production of itaconate, and its dependence on this metabolite represents a new therapeutic target for this cancer.

A cortical premotor network in HVC, once initiated, can sustain and regulate the sequential production of zebra finch song syllables without major extrinsic inputs.

Uncertainties in the absorptive properties of black and brown carbon particles limit our understanding of their warming potential. Following an extensive field campaign, Liuet al. report that the magnitude of warming is dependent on particle coatings, which vary due to source and photochemical aging.

This study detects Chlamydia pneumoniae in human retina and brain, increasing with AD severity. Retinal pathogen load with Aβ₄₂ may predict AD stage. In models, infection drives Aβ deposition and NLRP3 activation, worsening pathology and cognition.

Significant amounts of food waste are generated, and although composting is a useful route for such waste, the process is long. Here, the authors report the development of a microwave-assisted method for the rapid humification of waste potato, resulting in a fluvic acid-like fertiliser.