已确认可信度 85%Happened as dated, per interestingengineering.com[1]: "…HCb) collaboration at CERN, Switzerland announced their observation of a new particle with two charm…"
For many years, physicists have been aware of the existence of this doubly charmed particle because of current physical theories. However, nobody has been successful in observing the particle and it is only now that the baryon with two heavy quarks has been distinctively detected. Known as Ξcc++(Xicc++), this new particle is almost four times heavier than a proton.
The LHCb collaboration at CERN announced the observation of Xi_cc++, a baryon with two charm quarks and one up quark, at the EPS Conference on High Energy Physics in Venice in early July 2017[1][2][3]
Its mass is about 3621 MeV, almost four times that of a proton; all previously observed baryons contained at most one heavy quark[1][2]
The particle had long been predicted by theory but never observed[1][2][3]
It was identified through its decay to a Lambda_c+ baryon plus K-, pi+ and pi+, using 13 TeV run 2 data confirmed with 8 TeV run 1 data; the paper was submitted to Physical Review Letters[2][3]
Spokesperson Giovanni Passaleva said it is a unique tool to probe quantum chromodynamics, and Guy Wilkinson said it should behave like a planetary system, with a whole family of doubly charmed baryons predicted[1][2][3]
Lead physicist Patrick Spradlin (University of Glasgow) announced the result, with participation from University of Birmingham scientists and eleven UK institutes[3]
Happened as dated, per interestingengineering.com: "…HCb) collaboration at CERN, Switzerland announced their observation of a new particle with two charm…"
ScienceDaily reports the LHCb collaboration "has reported the observation of ΞCC++ (Xicc++)," published 8 July 2017, a day after the pin's stored 7 July date but within its window, corroborating the discovery.
University of Birmingham's own release states the LHCb experiment "has discovered a brand new heavy particle," published 6 July 2017, a day before the pin's stored date, likely reflecting an early release ahead of the wider CERN conference announcement.
CERN, 1, Route de Meyrin, Meyrin, Geneva, 1211, SwitzerlandCERN
已确认可信度 88%14.2年前CERN'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.
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
已确认可信度 88%127.7年前Wikipedia'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.
预估可信度 67%7.3年后A 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.
预估可信度 69%158天后Given as scheduled, per the source[1]: "planned for early 2027".
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.
The United Kingdom switched on its newest fusion reactor last week, and the ST40 has already hit a milestone -- plasma within its core. The reactor, created by Tokamak Energy, should heat plasma to 100 million degrees Celsius (or 180 million degrees Fahrenheit)
已确认可信度 90%3.6年前World 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.
National Press Club, 529, 14th Street Northwest, Downtown, Ward 2, Washington, District of Columbia, 20005, United StatesLIGO
已确认可信度 88%10.6年前Wikipedia[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.
MRC Laboratory of Molecular Biology (LMB), Francis Crick Avenue, Trumpington, Cambridge, Cambridgeshire, Cambridgeshire and Peterborough, England, CB2 0QH, United KingdomMRC Laboratory of Molecular Biology
已确认可信度 88%51.1年前Nature's[1] own page for the article gives citation_online_date 1975/08/01 and shows "01 August 1975" as the publication date, with the paper received 14 May 1975 and accepted 26 June 1975; it is Nature volume 256, issue 5517, pages 495-497.
Georges Köhler and César Milstein report in Nature that fusing an antibody-producing cell with a myeloma cell yields a line that secretes a single antibody indefinitely. Monoclonal antibodies become the basis of the modern biologics industry.
已确认可信度 85%114天前Happened as dated, per NVIDIA's[1][3] release: "TAIPEI, Taiwan, June 01, 2026 (GLOBE NEWSWIRE) -- NVIDIA GTC Taipei -- NVIDIA today announced the NVIDIA Isaac GR00T Reference Humanoid Robot."
At GTC Taipei, NVIDIA announced the first open humanoid reference design: a Unitree H2 Plus chassis with Sharpa Wave five-finger tactile hands for the body, and Jetson Thor compute plus the open Isaac GR00T stack for the brain, aimed at academic robotics labs.
已确认可信度 88%27天前The release is datelined "ABBOTT PARK, Ill., Aug. 27, 2026" and says Abbott "announced today it has received CE Mark for the Amulet 360 Left Atrial Appendage (LAA) Occluder".[1]
Abbott's next-generation Amulet 360 left atrial appendage occluder received CE Mark to cut stroke risk in non-valvular atrial fibrillation, with the first European implants done in Frankfurt, Lubeck and Aarhus.
