CERN Highlights 2025 As the year comes to a close, we reflect on some of the highlights from this remarkable year at CERN. We are looking forward to 2026 as we continue to search for what’s beyond the horizon. Watch here: youtu.be/X_OoXSMXyLg?...

🎁 The supporting structure of the new CMS HGCAL detector has arrived at @cern.bsky.social for assembly! 🛳️ 🚚 After an eight-week journey, the first HGCAL absorber structure was delivered and is ready to be assembled ready for #HiLumi! 👉 cms.cern/news/support...

This is TELMAX (Test Line for Machine and Antimatter eXperiments), the world’s first test beamline using antiprotons, located at CERN’s Antimatter Factory.

Private donors pledge 860 million euros for CERN’s Future Circular Collider A consortium of private donors (individuals and philanthropic foundations) have agreed to support the proposed Future Circular Collider at CERN Find out more: home.cern/news/press-r...

The magic of Christmas #AtCERN 🎄   This #ThrowbackThursday brings you back to winter celebrations at the Laboratory over the years.Which picture is your favourite? 👇

A cryogenic winter for tomorrow’s accelerator 💫 The first large refrigerators for the #HiLumiLHC have been installed. Here we see the delivery of a cold box on the @atlasexperiment.bsky.social site. Find out more: home.cern/news/news/ac...

CERN hits one exabyte of stored experimental data from the LHC #LHC 📈 One million terabytes of experimental data from the Large Hadron Collider have now been sent to the CERN storage system. Find our more: home.cern/news/news/co...

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Erik Kuna during the 2025 CERN Photowalk competition, held earlier this year. #PhysPics25 Image size has been adjusted to fit platform requirements.

Celebrating two decades of global scientific computing Developed to handle the vast amounts of data of the #LHC experiments, the Worldwide LHC Computing Grid (WLCG) has significantly marked the landscape of distributed computing. Find out more: home.cern/news/news/co...

Looking for a fun activity to do over the holiday season? 🔎 From public events and science shows to hands-on experiments, interactive physics demonstrations, and exhibitions, CERN Science Gateway has something for everyone, from age five and up. Plan your visit: visit.cern/

📣 Pre-registration for Beamline for Schools (#BL4S) is open. Beamline for Schools (#BL4S) is a #physics competition open to high-school students from all over the world.

The 3000°C Test 🌡️ To endure the increased beam intensities and stored energies of CERN's next hadron collider, the High-Luminosity #LHC, the beam dump system - an essential part of the accelerator's machine protection systems - must be upgraded.

Here we see BioDynaMo, the Biology Dynamics Modeller, an open-source, agent-based simulation software originally designed to model the behaviour of billions of cells. These visuals demonstrate how BioDynaMo can be used to study biological processes at scale.

The first coherent spin spectroscopy on a single antiproton performed by the BASE collaboration #AtCERN is recognised as one of the 2025 Top 10 Breakthroughs of the Year by @physicsworld.bsky.social.

The European Strategy for Particle Physics reaches an important milestone At its 225th session, the #CERN Council received the recommendations for the update of the European Strategy for Particle Physics. Read more: home.cern/news/press-r...

This #ThrowbackThursday we feature a set of event displays from 1987, recorded by the NA35 experiment. NA35 was a particle physics experiment #AtCERN, using particle beams from the SPS.  It studied relativistic nucleus–nucleus collisions to search for evidence of new forms of quark matter.

ALICE solves mystery of light-nuclei survival Observations of the formation of light-nuclei from high-energy collisions may help in the hunt for #DarkMatter. Read more: home.cern/news/news/ex...

LHC delivers a record number of particle collisions in 2025 💫 *cue the holiday music* 🎄 After a few final laps around the ring, the beams of the Large Hadron Collider were paused at 6.00 a.m. on Monday, 8 December for the usual year-end technical stop.

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Joan Torrijos during the 2025 CERN Photowalk competition, held earlier this year. #PhysPics25 Which one is your favourite? Let us know below. 👇 Image size has been adjusted to fit platform requirements.

Here we see the CERN-MEDICIS (Medical Isotopes Collected from ISOLDE) facility. The facility is designed to produce radioisotopes with the right properties to enhance the precision of patient imaging and treatment, and to improve the success of cancer treatment.

This week, we #ThrowbackThursday to last week’s Cité des Métiers – Geneva’s annual fair for professions and training – where CERN was the guest of honor of this year’s edition. #FunFact: CERN’s stand was designed with students from @IPAC Design Geneva.

Deciphering the heavyweights of the tetraquark world The @cmsexperiment.bsky.social reports the first measurement of the quantum properties of a family of tetraquarks that was recently discovered at the LHC Find out more: home.cern/news/news/ph...

FameLab takes centre stage at CERN 🎤 This #PhotoOfTheWeek captures the highlights from last week's FameLab final, held at the #CERNScienceGateway.

Here we see the delivery of warm helium compressors for the High-Luminosity Large Hadron Collider, the successor to CERN's Large Hadron Collider.

Superconductivity for addressing global challenges A CERN event brings together researchers, industry leaders and decision makers to accelerate the use of superconducting technologies for societal applications Find out more: home.cern/news/news/kn...

HIE-ISOLDE: 10 years, 10 highlights Since its first experiment in 2015, HIE-ISOLDE has been pushing back the boundaries of nuclear physics. To celebrate its 10th anniversary, we look back at ten key achievements that have defined its first decade. Find out more: home.cern/news/news/ac...

Cancer treatments have often followed hot on the heels of innovations in fundamental research. The latest edition of #CERNCourier explores particle therapy – an application of accelerators that looks set to surge in importance in the coming decades.

Back in the day 🔙 #ThrowbackThursday to 1968. This image depicts a van de Graaff generator with its tank removed and top terminal exposed, being prepared for shipment to the University of Swansea

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Vincent Hofer during the 2025 CERN Photowalk competition, held earlier this year. #PhysPics25

T-minus 8 hours 😁 Join us tonight, at 20:00 CET, to watch nine finalists from around the world step onto the stage at CERN to compete in the world’s longest-running science communication competition. Join us live: www.youtube.com/live/EZRj71l...

Here we see the SMOG2 installation in the cavern of the @lhcb.bsky.social SMOG stands for System for Measuring the Overlap with Gas.

FameLab international final 2025 at CERN Join us on Tuesday, 25 November 2025 at 8.00 p.m. CET for the FameLab international live final at CERN Science Gateway! Find out more: home.cern/news/news/ce...

Heavy-ion season underway 💪 On 14 November at 3:40 pm, a new #HeavyIon run started at the Large Hadron Collider, colliding lead ions at an energy of 5.36 TeV per nucleon pair.

#ThrowbackThursday to 1976 👷 Here we see an electrical vehicle called Pefra, which was often used by scientists and technicians to move around the 7km Super Proton Synchrotron’s (SPS) underground tunnel.

Breakthrough in antimatter production 💫 A new cooling technique means that the ALPHA experiment at CERN’s Antimatter Factory can produce antihydrogen atoms eight times faster than before. Find out more: home.cern/news/news/ex...

In this #PhotoOfTheWeek, we take a look at two @nobelprize.org medals, now on display #AtCERN. Last month, CERN unveiled the Nobel medal of Felix Bloch – CERN's first Director-General – awarded for the development of nuclear magnetic resonance (NMR) methods.

When failure is good news 🖥️ The software managing CERN’s compute workload has handled a massive stress test, far beyond normal operating conditions, designed to simulate the needs of the future. Find out more: home.cern/news/news/co...

CERN celebrates LGBTQ+ in STEM Day Today we celebrate and highlight the work of and barriers facing LGBTQIA+ people in science, technology, engineering and maths. To mark the date, the Progress Pride flag will fly above the Esplanade des Particules for the third year. 🔗 home.cern/news/news/ce...

Every year, CERN offers various professional development programmes for teachers. Last month, it was the turn of French teachers, who came to CERN to keep up-to-date with the latest developments in particle physics, and experience a dynamic research environment.

‘Tis the season of heavy ions Last Friday at 3.40 pm, a new #HeavyIon run began at the Large Hadron Collider, the fourth of #LHCRun3. Find out more about the primordial state of matter studied in heavy-ion collisions at the LHC: www.youtube.com/watch?v=mBfJ...

#ICYMI CERN took part in the Fête de la science from 3 to 13 October. During ten days, CERN offered a variety of activities throughout the Pays de Gex as part of a collaborative science trail organised by Addictlab.

Here we see the insertion of a novel beam screen into a magnet for the first time for the High-Luminosity Large Hadron Collider, the successor to CERN's LHC. With this milestone, one magnet is almost fully ready for the #HiLumiLHC tunnel. Find out more: hilumilhc.web.cern.ch/article/firs...

Issue 75 of Science in School is out! 🎉 It’s packed with classroom activities on radioactivity, chemical clocks, nutritional and environmental science. And offers exciting insights into antimatter, “cannibal” stars, quantum tech, and medical physics. 👉 scienceinschool.org/issue/issue-...

📣 Call for contributions If you are a project manager, project leader, or part of a project management team at a physics laboratory or #BigScience project, and would like to share your experience and connect with colleagues in the field, the AcceleratePM workshop is looking for contributions. 👇

The heart of operations Today’s #ThrowbackThursday takes us back to 1976 in the Linac 2 control room. While CERN's second linear accelerator, Linac 2, was under construction, its control room was already operational.

CERN reaffirms its commitment to environmentally responsible research with the release of its 4th Environment report Find out more: home.cern/news/news/ce...

Today, CERN’s #PhotoOfTheWeek features a series of images captured by Harald Wenzel during the 2025 CERN Photowalk competition, held earlier this summer. #PhysPics25 Which one is your favourite? Let us know below. 👇 📸 by Harald Wenzel

Arts at CERN and the Nobel Prize Museum collaborate on the Collide residency Find out more: home.cern/news/news/ce...

CERN Council reviews feasibility study for a next-generation collider At a meeting of the #CERN Council on 6-7 November, delegates from CERN’s Member and Associate Member States reviewed the outcome of the Feasibility Study for the proposed Future Circular Collider. 🔗 home.cern/news/news/ac...

Here we see the Alpha Magnetic Spectrometer (AMS) detector. Most recently upgraded in 2024, it searches for dark-matter signatures from cosmic rays, #antimatter, and missing matter from its position on the exterior of the International Space Station.