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The aquatic mammals disperse seeds of their favourite foods as they migrate, according to a serendipitous study of their poo.

Researchers have identified that a commonly repeated claim about levels of biodiversity on Indigenous lands is not only wrong, it is also counterproductive in conservation efforts.

‘Sneeze neurons’ activated by triggers such as pollen or a viral infection send an achoo signal, whereas cough neurons induce a hack.

Study in China finds viruses that could infect people are rampant in farms breeding mink, raccoons and foxes for their fur.

Telling people about the consensus among scientists can help, study finds, but experts think that personal conversations are needed, too.

Some are pivoting to alternative social-media platforms and scrambling to rebuild their networks.

Beef production accounts for 3% of country’s carbon emissions, but measures such as tree-planting offer help.

Process breaks down two of the most common plastics into raw ingredients.

Scientists have demonstrated all of the ingredients they need to make a nuclear clock. Plus, a study sheds light on how the immune systems of trans men are affected by hormone replacement therapy and we follow one scientist’s mission to protect his work from plagiarism.

A method that renders skin temporarily see-through could offer researchers a non-invasive way to look inside the bodies of live mice.

Fossils hint that bats’ wings sometimes lodged in fish’s throats, leading the bat-eater to die of hunger.

Modelling suggests that the Lassa virus could infect millions in a decade, but vaccines under development could sharply reduce deaths.

Physicists make breakthrough towards building a clock based on atomic nuclei — plus how engineered T cells could improve spinal injury outcomes.

A γδ T cell–IL-3 signalling axis is defined that controls the allergen responsiveness of cutaneous sensory neurons, leading to evidence for an immune rheostat that governs sensory neuronal responses to allergens on first exposure.

Precision functional mapping shows that the frontostriatal salience network occupies nearly twice as much of the cortex in people with depression, and this was unaffected by mood changes and detected in children before onset of symptoms.

A global macroplastic pollution emissions inventory and methodology is developed using machine learning and probabilistic material flow analysis, to identify hotspots across more than 50,000 municipalities worldwide from five land-based plastic waste emission sources.

Rapid ocean deoxygenation during the Early Cretaceous OAE1a is shown to provide evidence for a strong link between volcanic CO₂ emissions, weathering and ocean oxygen content that is characterized by a climate threshold.