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,…
Optical control of integer and fractional Chern insulators
Oka, T. & Aoki, H. Photovoltaic Hall effect in graphene. Phys. Rev. B 79, 081406 (2009). Article ADS …
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.…
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…
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…
Optical control over topological Chern number in moiré materials
Wang, Y. H., Steinberg, H., Jarillo-Herrero, P. & Gedik, N. Observation of Floquet-Bloch states on the surface of…
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…
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…
A Cambrian soft-bodied biota after the first Phanerozoic mass extinction
Erwin, D. H. & Valentine, J. W. The Cambrian Explosion: The Construction of Animal Biodiversity (Roberts & Company,…
Projected impacts of climate change on malaria in Africa
Our analysis framework comprised nine main stages, summarized in Extended Data Fig. 1. Preparation of consistent geotemporal climatologies,…