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DUNE 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.0.81Deep Underground Neutrino Experiment Begins
ESTIMATED63% CONFIDENCEin 4.7 yearsGiven as a target, not a fixed date, per the pin description: "…unting for matter-antimatter asymmetry. Estimated date.…"A neutrino beam fired 1,300 km from Fermilab to detectors a mile underground in South Dakota, hunting for matter-antimatter asymmetry. Estimated date.$5B0.77KONE Reopens Its Deep-Mine Elevator Test Lab in Tytyri, Finland
CONFIRMED90% CONFIDENCE9.5 years agoHappened as dated, per the source[1]: "has unveiled its renewed high-rise elevator testing facility in Tytyri, Finland, after extensive renovations."KONE finished renovating its underground elevator testing facility inside a Finnish limestone mine, extending its shafts to the world's deepest for free-fall and speed testing.0.66LIGO, Virgo and KAGRA Begin the IR1 Observing Run
NSF LIGO - Hanford, 127124, North Route 10, Richland, Benton County, Washington, 99354, United StatesLIGO
ESTIMATED68% CONFIDENCEin 53 daysThe collaborations' own observing plan, last updated 3 September 2026, gives only a window - a six-month run "beginning early- to mid-November of 2026" - and says the next update is due 15 October 2026 or sooner. With no day named, the pin takes the close of the stated window rather than its start, so it is not early; it moves when the collaborations name the day.[1]The gravitational-wave detectors start a six-month intermediate observing run before the fifth observing run. Both LIGO detectors take part, Virgo joins despite possible maintenance interruptions, and KAGRA joins as it becomes available.0.66Sphinx Observatory Opens Atop the Jungfraujoch
Jungfraujoch, Bernese Alps, Switzerland
CONFIRMED87% CONFIDENCE88.7 years agoHappened as dated, per the source[1]: "The Sphinx observatory ... was completed in 1937."The Sphinx Observatory, a research station tunnelled into a 3,571-metre Alpine summit above the Jungfraujoch, was completed in 1937 as one of Europe's most remote scientific buildings.0.65TBM Wanda Completes Drilling of the Albvorland Tunnel
CONFIRMED75% CONFIDENCE6.9 years agoImplenia's[4] own project news release dates the southern tube breakthrough to 29 October 2019.Tunnel boring machine Wanda finished excavating the southern tube of the Albvorland Tunnel, the last major breakthrough on Deutsche Bahn's Stuttgart-Ulm high-speed line. The 8-kilometer twin-tube tunnel near Wendlingen am Neckar was built by Implenia and cuts travel time between Stuttgart and Ulm to roughly 30 minutes.0.65Extremely Large Telescope First Light
ESTIMATED56% CONFIDENCEin 2.4 yearsGiven as a target, not a fixed date, per en.wikipedia.org[1]: "…and construction in July 2023, with the expected completion and first light set for March 2029.[13][…"A 39-metre segmented mirror in Chile's Atacama, collecting more light than all existing 8-10 metre telescopes combined. Estimated date.€1.1B0.65Chornobyl NPP Accepts Novarka's New Safe Confinement Into Operation
CONFIRMED90% CONFIDENCE8.9 years agoUkraine's Chornobyl NPP states it accepted the New Safe Confinement's Enclosing Perimeter into operation on 8 November 2017 (chnpp.gov.ua[2]).Ukraine's Chornobyl Nuclear Power Plant formally accepted the New Safe Confinement's Enclosing Perimeter from builder Novarka, completing the giant arch meant to contain the ruined Reactor 4 for a century. The 36,000-tonne steel structure, the largest movable land-based structure ever built, had been skidded into place over the old sarcophagus in November 2016.0.65Electron-Ion Collider Construction
ESTIMATED67% CONFIDENCEin 7.3 yearsA target, per the source[1]: the collider is "expected to become operational in the early to mid-2030s".Brookhaven National Laboratory is building the Electron-Ion Collider inside its existing RHIC tunnel, a $1.7-2.8BN US physics megaproject to study the glue holding matter together.0.64The Extremely Large Telescope Reaches First Light
ESTIMATED68% CONFIDENCEin 2.5 yearsESO[1][2] states the ELT "is now set to make its first test observations at the beginning of 2029, with 'telescope first light' expected in March 2029". Only the month is given, so the pin takes its last day.ESO's 39-metre Extremely Large Telescope takes its first test observations from Cerro Armazones in March 2029, with scientific first light following in December 2030.0.64LIGO Announces the First Detection of Gravitational Waves
National Press Club, 529, 14th Street Northwest, Downtown, Ward 2, Washington, District of Columbia, 20005, United States
CONFIRMED88% CONFIDENCE10.6 years agoWikipedia[2] dates both the observation and the announcement: "The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO[3] and Virgo collaborations on 11 February 2016." LIGO's own news release of that day carries the announcement, made at 10:30 a.m. Eastern at the National Press Club, where this pin is placed.At a press conference at the National Press Club in Washington, the LIGO and Virgo collaborations announce GW150914, a signal from the merger of two black holes recorded by both LIGO detectors on 14 September 2015 - the first direct observation of gravitational waves.0.64Salt Lake Temple Completes Seismic Base-Isolation Retrofit
CONFIRMED88% CONFIDENCE85 days agoHappened as dated, per the source[1]: "Starting Thursday, June 25, construction crews removed over 1,500 bolts connecting 392 plates to the base isolators."Crews finished installing a base-isolation system beneath the 19th-century Salt Lake Temple as part of an estimated $2.4 billion project to let the building float free of the ground during a major earthquake.$2.4B0.63
