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Hyper-Kamiokande Neutrino Observatory Cavern Completed
Kamioka, Hida, Gifu Prefecture, Japan
CONFIRMED89% CONFIDENCE1.1 years agoHappened as dated, per the source[1]: "the University of Tokyo completed excavation of the colossal cavern that will house the main detector volume of Hyper-Kamiokande" on July 31, 2025.Crews finished excavating the huge cavern in a Japanese mountain that will house the Hyper-Kamiokande neutrino observatory, a step toward the detector's planned start of observations.$600M0.62The Royal Swedish Academy Names the 2026 Chemistry Laureates
SCHEDULED87% CONFIDENCEin 14 daysThe Nobel Foundation's press release sets it for "Wednesday, 7 October, 11:45 CEST at the earliest", so the hour can slip later in the day.[1]The Royal Swedish Academy of Sciences announces the 2026 Nobel Prize in Chemistry from its Session Hall at Frescati in Stockholm, a day after the physics prize.0.61DUNE Far Detector Caverns Excavation Completed
CONFIRMED90% CONFIDENCE2.1 years agoHappened as dated, per the source[1]: "completion of excavation work for the Long-Baseline Neutrino Facility".Crews finished carving three enormous caverns a mile beneath a former South Dakota gold mine to house the Deep Underground Neutrino Experiment.0.60Vogtle Unit 4 Enters Commercial Operation
CONFIRMED90% CONFIDENCE2.4 years agoHappened as dated, per the source[1]: "Vogtle Unit 4 enters commercial operation" on "April 29, 2024".Georgia's Plant Vogtle Unit 4 entered commercial operation in April 2024, completing the first new nuclear reactors built from scratch in the US in over three decades.0.60CERN Announces a Particle Consistent With the Higgs Boson
CONFIRMED88% CONFIDENCE14.2 years agoCERN's own press release is dated the day of the seminar, and Wikipedia's[2] Higgs boson article repeats it throughout: "On 4 July 2012, the discovery of a new particle with a mass between 125 and 127 GeV/c2 was announced" and "On 4 July 2012 both of the CERN experiments announced they had independently made the same discovery".At a seminar at CERN, the ATLAS and CMS experiments each report a new boson at around 125-126 GeV at five sigma, independently and from the same data-taking runs. It is the last unverified piece of the Standard Model.0.60High-Luminosity LHC Starts Up
ESTIMATED53% CONFIDENCEin 3.7 yearsGiven as a target, not a fixed date, per the pin description: "…arch for rare processes into the 2040s. Estimated date.…"An upgrade to increase the LHC's collision rate roughly tenfold, extending the search for rare processes into the 2040s. Estimated date.0.60JUICE Arrives at Jupiter
ESA's mission to Ganymede, Callisto and Europa, ending as the first spacecraft to orbit a moon of another planet. Scheduled date.€1.5B0.60ITER Starts Research Operations
ESTIMATED68% CONFIDENCEin 8.3 yearsITER's[1] updated 2024 baseline gives 2034 for the start of research activities. Only the year is stated, so the pin takes its last day.ITER's 2024 baseline puts the start of research operations in 2034, opening a period of hydrogen and deuterium plasma experiments at the fusion reactor in southern France.0.60Rosatom Delivers ITER's Last Poloidal Field Coil to the Cadarache Site
CONFIRMED90% CONFIDENCE3.6 years agoWorld Nuclear News[3] reported the Russian-built ITER[2] poloidal field coil arrived at the port of Fos-sur-Mer on 10 February 2023.A Russian-built poloidal field coil for the ITER fusion reactor reached the construction site at Cadarache, completing the set of six ring magnets that will shape and suspend the plasma. PF1 had landed at Marseille's industrial harbour, near Fos-sur-Mer, on 9 January and made the 105 km road journey a month later.0.59European Spallation Source Aims for First Neutrons
A 13-nation collaboration near Lund, Sweden is finishing a roughly €3 billion (about $3.5 billion) neutron research facility built around one of the world's most powerful linear particle accelerators.$3B0.59Mendeleev Presents the Periodic Table
St. Petersburg State University, Менделеевская линия, округ № 7, Saint Petersburg, Northwestern Federal District, 199034, RussiaRussian Chemical Society
CONFIRMED85% CONFIDENCE157.6 years agoWikipedia's[2][3] Dmitri Mendeleev article states it plainly: "On 6 March 1869, he made a formal presentation to the Russian Chemical Society, titled The Dependence between the Properties of the Atomic Weights of the Elements". Russia was still on the Julian calendar, so contemporary Russian sources date the work to February; the manuscript sheet on Commons is signed 17.02.1869, the Julian date for 1 March, and the pin uses the Gregorian date Wikipedia gives for the presentation itself.Dmitri Mendeleev's paper The Dependence between the Properties of the Atomic Weights of the Elements is read to the Russian Chemical Society in St Petersburg, arranging the known elements by atomic weight and valence and leaving gaps for elements not yet found.0.59The Royal Swedish Academy Names the 2026 Economic Sciences Laureates
SCHEDULED87% CONFIDENCEin 19 daysThe Nobel Foundation's press release sets it for "Monday, 12 October, 11:45 CEST at the earliest", so the hour can slip later in the day.[1]The Royal Swedish Academy of Sciences announces the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel, closing the 2026 announcement season. It is the only one of the six not established by Alfred Nobel's will.0.58
