Body condition among Svalbard Polar bears Ursus maritimus during a period of rapid loss of sea ice
Parmesan, C. & Yohe, G. A globally coherent fingerprint of climate change impacts across natural systems. Nature 421,…
Critical social media posts linked to retractions of scientific papers
Credit: Beata Zawrzel/NurPhoto via Getty Posts on social-media platform X that are critical of scientific research can act…
Alternative explanation for how celestial objects generate large-scale magnetic fields
RESEARCH BRIEFINGS 28 January 2026 Numerical simulations provide a mechanism that explains how celestial objects such as stars…
Ferromagnet-like binary switching of a Stoner–Wohlfarth antiferromagnet
The response of magnetization to external stimuli has drawn attention for more than a century, providing fundamental insights…
Vacuum ultraviolet second-harmonic generation in NH4B4O6F crystal
Eaton, D. F. Nonlinear optical materials. Science 253, 281–287 (1991). Article ADS CAS PubMed Google Scholar Meng, J.…
Lasing of a cavity-based X-ray source
Shortly after the free-electron laser (FEL) concept was proposed in the 1970s11, the first FEL oscillator was developed12…
Accurate determination of the 3D atomic structure of amorphous materials
Nomura, K. et al. Room-temperature fabrication of transparent flexible thin-film transistors using amorphous oxide semiconductors. Nature 432, 488–492…
Realization of two-dimensional discrete time crystals with anisotropic Heisenberg coupling
Srednicki, M. Chaos and quantum thermalization. Phys. Rev. E 50, 888 (1994). Article ADS CAS Google Scholar Rigol,…
Low-power integrated optical amplification through second-harmonic resonance
Desurvire, E. Erbium-Doped Fiber Amplifiers: Principles and Applications (Wiley, 1994). Tse, M. et al. Quantum-enhanced advanced LIGO detectors…
Bandwidth-tuned Mott transition and superconductivity in moiré WSe2
Anderson, P. W. The resonating valence bond state in La2CuO4 and superconductivity. Science 235, 1196–1198 (1987). Article ADS …
Constraints on axion dark matter by distributed intercity quantum sensors
Bertone, G. & Hooper, D. History of dark matter. Rev. Mod. Phys. 90, 045002 (2018). Article CAS ADS …
Observation of a superfluid-to-insulator transition of bilayer excitons
Anderson, M. H., Ensher, J. R., Matthews, M. R., Wieman, C. E. & Cornell, E. A. Observation of…