Physics, astronomy and space science.
A study found that amino acids and nucleotide building blocks could jointly produce short peptides and oligonucleotides in one-pot reactions under prebiotic conditions. The linked chemistry formed a reactive intermediate that was associated with greater amounts of some oligomers than reactions using either type of building block alone.
Researchers transported 92 trapped antiprotons 7.5 kilometres by road without losing particles or measurably worsening the trap’s vacuum. The demonstration could allow future matter–antimatter tests in laboratories with less magnetic-field noise than CERN’s Antimatter Factory.
Researchers developed an attack that uses an AI classifier to reconstruct representative images from its private training data. In tests, the approach produced more faithful images than earlier methods while maintaining similar accuracy in identifying their target classes.
Researchers report a lensless microscope that imaged an entire 500-micrometer-thick, optically cleared mouse-brain slice without labels. The system combines a large field of view with millimeter-scale depth and approximately 2.4-micrometer pixel-level resolution, reaching a three-dimensional imaging volume above a gigavoxel scale in tests.
Researchers report a bright, narrow beam of muonium made by extracting it from a thin layer of superfluid helium. The beam is expected to enable a new test of gravity and more precise measurements of the muon.
Researchers have combined two organic light-emitting materials in a redesigned device that produces narrowband emission with little change in color as the viewing angle shifts. The devices reached external quantum efficiencies above 20% in both bottom- and top-emitting designs, more than twice the performance previously reported for similar polariton devices.
Researchers have demonstrated an integrated quantum memory with 11 independently controlled channels in a europium-doped crystal. It stored three time-bin qubits with fidelity above 99% and five-dimensional path-encoded states with fidelity above 96%.
Astronomers have studied a rapidly spinning neutron star in a roughly one-day orbit with a likely helium white dwarf. Its unusually changing orbit and signs of magnetized material between the stars suggest it may represent a transitional stage between two types of binary systems.
Researchers have proposed a way to reconstruct a possible bound state made of a top quark and its antimatter partner near the production threshold at the Large Hadron Collider. Preliminary results suggest the method could improve sensitivity by as much as 12 percent over the current strategy planned for the collider’s Run 3.
Researchers laser-sintered lunar soil simulants into Lego-like building blocks that can be rearranged without extra joining material. The proof-of-concept blocks reached a peak compressive strength of about 3.4 MPa.
Researchers describe how a refractive-index boundary moving at the speed of light could trap weak light in time rather than in a fixed region of space. The approach could store, compress and reshape very weak pulses, including single photons, while allowing controlled release through a one-way channel.
Researchers developed and tested a model for using compressed gas to carry rock chips out of a deep borehole on Mars. The model showed reasonable agreement with vacuum and full-system experiments, offering guidance for drilling into buried ice deposits.
Some black holes in the early universe appear unusually massive compared with the galaxies around them. A modelling study suggests that brief, repeated bursts of rapid feeding, triggered by major galaxy mergers, could explain this pattern and the brightness of some active black holes seen by JWST.
Researchers developed an AI-based method for reconstructing changing radio images of black-hole jets as continuous videos. Applied to repeated observations of the blazar 3C 345, it estimated the local, instantaneous motion of plasma rather than tracking only separate jet features.
Astronomers have confirmed six dense groups of young galaxies from about 2.4 to 3.1 billion years after the Big Bang and reconstructed their three-dimensional structures. Galaxies in the densest regions showed brighter hydrogen emission and fewer faint emitters than galaxies in less crowded surroundings.
