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Asteroid Bennu contains building blocks of life

mercredi 29 janvier 2025 par Nick Petri? Howe, Benjamin Thompson
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00267-0Bennu gives researchers clues about how the chemicals that make up life arose, how a maize monoculture might have supported a mysterious civilization and why the new AI model DeepSeek R1 has sent shockwaves around the (...)

Dipoles disordered by design to increase capacity of energy-storage devices

mercredi 29 janvier 2025 par Piush Behera, Suraj S. Cheema
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00085-4Energy-storage devices called capacitors deliver power rapidly, but the amount of energy they can absorb is limited. Deliberately disordered electric dipoles in ‘antiferroelectric’ capacitor materials could solve this (...)

Diversity of human gut microbes in Africa reflects geography, lifestyle and health status

mercredi 29 janvier 2025
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00184-2Low- and middle-income countries are under-represented in research into the gut microbiome, and addressing this is key to understanding the link between gut-resident microorganisms and health. A large study of the (...)

Asteroid fragments upend theory of how life on Earth bloomed

mercredi 29 janvier 2025 par Alexandra Witze
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00264-3Samples from Bennu contain the chemical building blocks of life — but with a twist.

Signs of damage that drive protein degradation

mercredi 29 janvier 2025 par Alfred Freeberg, Michael Rapé
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00082-7Many environmental toxins damage proteins, which then must be removed to avoid dangerous protein aggregation and disease. How cells dispose of chemically modified proteins has been unclear, but a discovery offers some (...)

Daily briefing: Chaos erupts in US science as Trump’s team declares freeze on federal grants

mercredi 29 janvier 2025 par Flora Graham
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00280-3US scientists are reeling from a Trump-administration freeze on federal grants. Plus, fast radio bursts are even weirder than previously thought.

Evidence that engineered muscle could patch up failing hearts

mercredi 29 janvier 2025
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00193-1Sustainable engraftment of heart muscle cells (cardiomyocytes) can be achieved by implanting patches of engineered heart muscle onto the surface of the heart under immune suppression. Evidence from rhesus macaques and an (...)

‘Breakthrough’ stem-cell patches strengthened a woman’s failing heart

mercredi 29 janvier 2025 par Miryam Naddaf
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00273-2Grafting patches of lab-grown muscle to the surface of the heart could offer a lifeline for people waiting for a transplant.

Antarctic ice shelf kept its cool during the last interglacial period

mercredi 29 janvier 2025
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00190-4There is indirect evidence that, during the last interglacial period, about 125,000 years ago, parts of the West Antarctic Ice Sheet retreated. An ice core drilled from the ice sheet near the bordering Ronne Ice Shelf (...)

Asteroid Bennu contains salts from ancient brine

mercredi 29 janvier 2025 par Yasuhito Sekine
Nature, Published online: 29 January 2025; doi:10.1038/d41586-025-00084-5A space mission to an asteroid has returned extremely delicate salts not previously observed in extraterrestrial materials. An analysis of these salts helps to establish the history of water in the early Solar (...)

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