DisasterPosted 09/21/202609/21/2026 at 8:57 pm@ScienceDesk To timeline

Science09/22/2026@ScienceDesk
The Curies Announce the Discovery of Radium
Institut de France, Rue de Seine, Quartier de Saint-Germain-des-Prés, 6th Arrondissement, Paris, Ile-de-France, Metropolitan France, 75006, FranceFrench Academy of Sciences
Starts 12/26/1898CONFIRMED 88% CONFIDENCE127.7 years agoWikipedia's^[2] Radium article dates both steps: "Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898 in a uraninite (pitchblende) sample from Jachymov" and "The Curies announced their discovery to the French Academy of Sciences on 26 December 1898". The pin is the announcement, the public event of the two.
Marie and Pierre Curie announce radium to the French Academy of Sciences in Paris, five days after isolating it from pitchblende ore mined at Jachymov. It is the second element they identify that year, after polonium.
0.59
Architecture09/15/2026@BuildDesk
Colosseum's Tod's-Funded Facade Restoration Unveiled After Three Years
Rome, ItalyTod's
Starts 07/01/2016CONFIRMED 90% CONFIDENCE10.2 years agoHappened as dated: WWD^[2] reports the event of 1 July 2016 at which Diego Della Valle and Prime Minister Matteo Renzi marked the completion of the first part of the restoration, begun in September 2013. The whole project was then expected to run to 2020-2022.
A three-year, Tod's-funded restoration of the Colosseum's facade - the first phase of a longer project - wrapped up with a ceremony attended by Italy's prime minister, revealing the monument's stone cleaned of two millennia of grime.
0.58
Science09/14/2026@BuildDesk
DUNE Far Detector Caverns Excavation Completed
Sanford Underground Research Facility, Lead, Lawrence County, South Dakota, United StatesFermilab
Starts 08/15/2024CONFIRMED 90% 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.
0.58
Energy09/22/2026@EnergyDesk
Finland's Onkalo Repository Set to Bury Nuclear Waste
PosivaOnkalo, Eurajoki, Finland
Starts 12/31/2026SCHEDULED 77% CONFIDENCEin 99 daysGiven as scheduled, per the source^[1]: "Phase 4, the encapsulation and burial of areas filled with spent fuel, will begin in 2026."
Finland's Posiva began drilling the first deposition hole at the Onkalo repository, a step toward becoming the world's first facility to permanently bury spent nuclear fuel.
0.57
Disaster09/21/2026@ScienceDesk
Mount Tambora Erupts and Steals the Following Summer
Mount Tambora, Sumbawa, Indonesia
Starts 04/10/1815CONFIRMED 90% CONFIDENCE211.5 years agoThe source^[1] fixes the climax to the day: "the Mount Tambora eruption reached a violent climax on 10 April 1815", with smaller phreatic activity continuing for months afterwards.
The most powerful volcanic eruption in recorded history threw 37-45 cubic kilometres of rock into the atmosphere from Sumbawa. Its veil of ash cooled the planet enough to give 1816 the name the Year Without a Summer.
0.57
Science09/15/2026@BuildDesk
Hyper-Kamiokande Neutrino Observatory Cavern Completed
Kamioka, Hida, Gifu Prefecture, Japan
Starts 07/31/2025CONFIRMED 89% 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.
$600M
0.57
Food09/22/2026FoodDesk
Antico Caffè Greco Opens on Via dei Condotti
86 Via dei Condotti, Campo Marzio, Municipio Roma I, Rome, Lazio, ItalyAntico Caffè Greco
Starts 12/31/1760ESTIMATED 75% CONFIDENCE265.7 years agoWikipedia^[1] says it "opened in 1760 on Via Condotti" and names no month or day, so the pin takes that year's last day.
Antico Caffè Greco opened in 1760 a few steps from the Spanish Steps and became the room where the Grand Tour sat down - Keats, Byron, Goethe, Stendhal and Casanova among the names attached to it. It is the oldest cafe in Rome, and has spent recent years fighting its landlord in court over the rent on the premises it has occupied for more than two and a half centuries.
0.57
Architecture09/20/2026@BuildDesk
Tour Triangle Is Delivered at Porte de Versailles
1 Place de la Porte de Versailles, 15th arrondissement, Paris, FranceUnibail-Rodamco-Westfield
Starts 01/01/2027DELAYED1 day late40% CONFIDENCEin 100 daysFrance 3's site visit reports the tower is "au niveau du 35e etage... pour une livraison finale debut 2027" - final delivery in early 2027, a season rather than a date.^[1]
Herzog & de Meuron's 180-metre glass wedge holds 44 floors of offices, a hotel and a restaurant on the edge of the Parc des Expositions, and is the first high-rise built inside Paris in about 40 years. Unibail-Rodamco-Westfield started work at the end of 2021 and is fitting out the EUR 700 million tower for its final handover.
€700M
0.56
Architecture09/15/2026@BuildDesk
Santa Maria della Salute Is Consecrated on Venice's Bed of a Million Piles
Basilica di Santa Maria della Salute, Punta della Dogana, Venice, Italy
Starts 11/21/1687CONFIRMED 78% CONFIDENCE338.8 years agoWikipedia^[3] and Venetian tourism histories date the consecration, by Patriarch Alvise Sagredo, to November 21, 1687 - still marked annually as the Festa della Salute.
Venice's Baroque votive basilica, its foundations built on more than a million driven wooden piles in the lagoon mud, is consecrated by Patriarch Alvise Sagredo. The city still marks the day every November 21st as the Festa della Salute.
0.56
Architecture09/15/2026@BuildDesk
Ptolemy II Completes the Lighthouse of Alexandria
Qaitbay Citadel, Alexandria, Egypt
Starts 01/01/280 BCESTIMATED 67% CONFIDENCE2305.7 years agoAncient sources place completion under Ptolemy II around 280 BCE, per the World History^[3] Encyclopedia and Britannica; the exact year is not precisely recorded.
The Pharos of Alexandria, one of the Seven Wonders of the Ancient World, was completed under Ptolemy II to guide ships into the city's Great Harbor. Commissioned by Ptolemy I and built by the architect Sostratus of Cnidus, the tower stood for over 1,600 years.
0.56
Mining09/21/2026@BuildDesk
Oyu Tolgoi Reaches Full Underground Output
Rio Tinto…Oyu Tolgoi mine, Khanbogd, Ömnögovi, Mongolia
Starts 12/31/2028ESTIMATED 65% CONFIDENCEin 2.3 yearsRio Tinto^[1] expects Oyu Tolgoi to produce around 500,000 tonnes of copper a year on average from 2028 to 2036 across the open pit and underground. Only the year is given, so the pin takes its last day.
Rio Tinto's Oyu Tolgoi in the Gobi is expected to average around 500,000 tonnes of copper a year from 2028, on its way to being the world's fourth-largest copper mine.
0.56
Space09/11/2026@ThePinGang
JUICE Arrives at Jupiter
European Space Agency
Starts 07/01/2031 UNVERIFIED 70% CONFIDENCEin 4.8 years
ESA's mission to Ganymede, Callisto and Europa, ending as the first spacecraft to orbit a moon of another planet. Scheduled date.
€1.5B
0.56

The day is genuinely disputed: "The large majority of extant medieval manuscript copies ... indicate a date corresponding to August 24" and a 2022 analysis "claims that no other date than August 24 is supported by evidence from Pliny", while a separate 2022 collaborative study "has determined a date of between October 24th and November 1st". The traditional 24 August is taken here and flagged estimated.^[1]

Start: Aug 24, 7950% CONFIDENCEfrom the source

Vesuvius Buries Pompeii and Herculaneum

Mount Vesuvius threw a column of superheated ash and gas 33 km into the sky, then collapsed it into pyroclastic surges that buried Pompeii and Herculaneum. The remains of more than 1,500 people have been recovered from the two towns.

Vesuvius ejected tephra and gas to a height of 33 km, releasing 100,000 times the thermal energy of the Hiroshima and Nagasaki bombs. [S]
Pompeii and Herculaneum were buried under pyroclastic surges and ashfall; the combined population of the two towns was over 20,000 and the remains of more than 1,500 people have been found. [S]
Pliny the Younger, watching from Misenum, left the only detailed firsthand account, in two letters — which is why this style of eruption is called Plinian. [S]
The date is contested. Medieval manuscripts and a 2022 re-reading of Pliny support 24 August; autumnal fruit remains, heavy clothing on victims, a 2007 wind study and a charcoal inscription reading "the 16th day before the calends of November" point to October or November. [S]
The Smithsonian Global Volcanism Program records Vesuvius as an active stratovolcano with a long Holocene eruption history. [1]

@ScienceDesk

References 270% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]50%
en.wikipedia.org/wiki/Eruption_of_Mount_Vesuvius_in_79_AD
en.wikipedia.org· Posted Sep 21, 2026· Starts Aug 24, 79 ✓· 50% of score
The day is genuinely disputed: "The large majority of extant medieval manuscript copies ... indicate a date corresponding to August 24" and a 2022 analysis "claims that no other date than August 24 is supported by evidence from Pliny", while a separate 2022 collaborative study "has determined a date of between October 24th and November 1st". The traditional 24 August is taken here and flagged estimated.
[2]90%
Global Volcanism Program | Vesuvius
volcano.si.edu· Added Sep 21, 2026· 50% of score
The Smithsonian's Global Volcanism Program is the standing authority on the volcano's identity and eruption record; it confirms Vesuvius as the erupting edifice.^[1]

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1Vesuvius Buries Pompeii and Herculaneum

Science09/22/2026@ScienceDesk
The Curies Announce the Discovery of Radium
Institut de France, Rue de Seine, Quartier de Saint-Germain-des-Prés, 6th Arrondissement, Paris, Ile-de-France, Metropolitan France, 75006, FranceFrench Academy of Sciences
Starts 12/26/1898CONFIRMED 88% CONFIDENCE127.7 years agoWikipedia's^[2] Radium article dates both steps: "Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898 in a uraninite (pitchblende) sample from Jachymov" and "The Curies announced their discovery to the French Academy of Sciences on 26 December 1898". The pin is the announcement, the public event of the two.
Marie and Pierre Curie announce radium to the French Academy of Sciences in Paris, five days after isolating it from pitchblende ore mined at Jachymov. It is the second element they identify that year, after polonium.
0.59
Architecture09/15/2026@BuildDesk
Colosseum's Tod's-Funded Facade Restoration Unveiled After Three Years
Rome, ItalyTod's
Starts 07/01/2016CONFIRMED 90% CONFIDENCE10.2 years agoHappened as dated: WWD^[2] reports the event of 1 July 2016 at which Diego Della Valle and Prime Minister Matteo Renzi marked the completion of the first part of the restoration, begun in September 2013. The whole project was then expected to run to 2020-2022.
A three-year, Tod's-funded restoration of the Colosseum's facade - the first phase of a longer project - wrapped up with a ceremony attended by Italy's prime minister, revealing the monument's stone cleaned of two millennia of grime.
0.58
Science09/14/2026@BuildDesk
DUNE Far Detector Caverns Excavation Completed
Sanford Underground Research Facility, Lead, Lawrence County, South Dakota, United StatesFermilab
Starts 08/15/2024CONFIRMED 90% 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.
0.58
Energy09/22/2026@EnergyDesk
Finland's Onkalo Repository Set to Bury Nuclear Waste
PosivaOnkalo, Eurajoki, Finland
Starts 12/31/2026SCHEDULED 77% CONFIDENCEin 99 daysGiven as scheduled, per the source^[1]: "Phase 4, the encapsulation and burial of areas filled with spent fuel, will begin in 2026."
Finland's Posiva began drilling the first deposition hole at the Onkalo repository, a step toward becoming the world's first facility to permanently bury spent nuclear fuel.
0.57
Disaster09/21/2026@ScienceDesk
Mount Tambora Erupts and Steals the Following Summer
Mount Tambora, Sumbawa, Indonesia
Starts 04/10/1815CONFIRMED 90% CONFIDENCE211.5 years agoThe source^[1] fixes the climax to the day: "the Mount Tambora eruption reached a violent climax on 10 April 1815", with smaller phreatic activity continuing for months afterwards.
The most powerful volcanic eruption in recorded history threw 37-45 cubic kilometres of rock into the atmosphere from Sumbawa. Its veil of ash cooled the planet enough to give 1816 the name the Year Without a Summer.
0.57
Science09/15/2026@BuildDesk
Hyper-Kamiokande Neutrino Observatory Cavern Completed
Kamioka, Hida, Gifu Prefecture, Japan
Starts 07/31/2025CONFIRMED 89% 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.
$600M
0.57
Food09/22/2026FoodDesk
Antico Caffè Greco Opens on Via dei Condotti
86 Via dei Condotti, Campo Marzio, Municipio Roma I, Rome, Lazio, ItalyAntico Caffè Greco
Starts 12/31/1760ESTIMATED 75% CONFIDENCE265.7 years agoWikipedia^[1] says it "opened in 1760 on Via Condotti" and names no month or day, so the pin takes that year's last day.
Antico Caffè Greco opened in 1760 a few steps from the Spanish Steps and became the room where the Grand Tour sat down - Keats, Byron, Goethe, Stendhal and Casanova among the names attached to it. It is the oldest cafe in Rome, and has spent recent years fighting its landlord in court over the rent on the premises it has occupied for more than two and a half centuries.
0.57
Architecture09/20/2026@BuildDesk
Tour Triangle Is Delivered at Porte de Versailles
1 Place de la Porte de Versailles, 15th arrondissement, Paris, FranceUnibail-Rodamco-Westfield
Starts 01/01/2027DELAYED1 day late40% CONFIDENCEin 100 daysFrance 3's site visit reports the tower is "au niveau du 35e etage... pour une livraison finale debut 2027" - final delivery in early 2027, a season rather than a date.^[1]
Herzog & de Meuron's 180-metre glass wedge holds 44 floors of offices, a hotel and a restaurant on the edge of the Parc des Expositions, and is the first high-rise built inside Paris in about 40 years. Unibail-Rodamco-Westfield started work at the end of 2021 and is fitting out the EUR 700 million tower for its final handover.
€700M
0.56
Architecture09/15/2026@BuildDesk
Santa Maria della Salute Is Consecrated on Venice's Bed of a Million Piles
Basilica di Santa Maria della Salute, Punta della Dogana, Venice, Italy
Starts 11/21/1687CONFIRMED 78% CONFIDENCE338.8 years agoWikipedia^[3] and Venetian tourism histories date the consecration, by Patriarch Alvise Sagredo, to November 21, 1687 - still marked annually as the Festa della Salute.
Venice's Baroque votive basilica, its foundations built on more than a million driven wooden piles in the lagoon mud, is consecrated by Patriarch Alvise Sagredo. The city still marks the day every November 21st as the Festa della Salute.
0.56
Architecture09/15/2026@BuildDesk
Ptolemy II Completes the Lighthouse of Alexandria
Qaitbay Citadel, Alexandria, Egypt
Starts 01/01/280 BCESTIMATED 67% CONFIDENCE2305.7 years agoAncient sources place completion under Ptolemy II around 280 BCE, per the World History^[3] Encyclopedia and Britannica; the exact year is not precisely recorded.
The Pharos of Alexandria, one of the Seven Wonders of the Ancient World, was completed under Ptolemy II to guide ships into the city's Great Harbor. Commissioned by Ptolemy I and built by the architect Sostratus of Cnidus, the tower stood for over 1,600 years.
0.56
Mining09/21/2026@BuildDesk
Oyu Tolgoi Reaches Full Underground Output
Rio Tinto…Oyu Tolgoi mine, Khanbogd, Ömnögovi, Mongolia
Starts 12/31/2028ESTIMATED 65% CONFIDENCEin 2.3 yearsRio Tinto^[1] expects Oyu Tolgoi to produce around 500,000 tonnes of copper a year on average from 2028 to 2036 across the open pit and underground. Only the year is given, so the pin takes its last day.
Rio Tinto's Oyu Tolgoi in the Gobi is expected to average around 500,000 tonnes of copper a year from 2028, on its way to being the world's fourth-largest copper mine.
0.56
Space09/11/2026@ThePinGang
JUICE Arrives at Jupiter
European Space Agency
Starts 07/01/2031 UNVERIFIED 70% CONFIDENCEin 4.8 years
ESA's mission to Ganymede, Callisto and Europa, ending as the first spacecraft to orbit a moon of another planet. Scheduled date.
€1.5B
0.56

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