Hello Nature readers, would you like to get this Briefing in your inbox free every day? Sign up here. Glueballs are made of gluons, which bind quarks to form protons and neutrons.Credit: Sefa kart/Getty A team of physicists says it has observed strong evidence of a mysterious ‘glueball’, a particle made up of force-carrying gluons.
Outsider Animals Marlene Zuk Princeton Univ. Press (2026) Evolutionary biologist Marlene Zuk’s charming book begins with a night-time encounter with young raccoons (Procyon lotor) on the deck outside her bedroom in California. They were playing noisily with a hose — and when she tried to shoo them away, one stood up and raised its forelegs,
Growing undocumented populations were linked to falling property crime and assaults — but more robberies.Credit: John Moore/Getty Neighbourhoods across the United States that experienced a growth in their undocumented population also saw property-related and violent crime fall, not rise, according to an analysis of 11,500 neighbourhoods in more than 100 cities. In a paper published
Feigenbaum, E. A. The art of artificial intelligence: themes and case studies of knowledge engineering. In Proc. 5th International Joint Conference on Artificial Intelligence (IJCAI ’77) Vol. 2, 1014–1029 (Morgan Kaufmann, 1977). Russell, S. J. & Norvig, P. Artificial Intelligence: A Modern Approach (Prentice Hall, 1995). Sutton, R. S. & Barto, A. Reinforcement Learning: An
Holst, V., Algaba, A., Tori, F., Wenmackers, S. & Ginis, V. Dataset artefacts can partially drive the measured decline in disruption. Nature https://doi.org/10.1038/s41586-026-10787-y (2026). Article Google Scholar Park, M., Leahey, E. & Funk, R. J. Papers and patents are becoming less disruptive over time. Nature 613, 138–144 (2023). Article ADS CAS PubMed Google Scholar Wu,
Experimental set-up The set-up consists of the spatial DOP modulator interfaced separately with the high-dimensional PNN and the encryption–decryption system. These two blocks make a different use of scattering media and digital neural networks and are described hereafter in dedicated subsections. The DOP modulator is composed of a phase-only liquid-crystal-on-silicon SLM (Hamamatsu X13138, 1,280 × 1,024 pixels, 12.5 μm