On December 3, 2025, the Astroparticle & Cosmology Laboratory welcomed a Polish delegation led by Prof. Andrzej Szeptycki, Undersecretary of State at the Polish Ministry of Science and Higher Education. This visit was part of the 8th Franco-Polish Forum for Science and Innovation. It comes at a pivotal moment: the signing of an agreement between the CNRS and the Polish Academy of Sciences, aimed at strengthening the partnership between the APC and the future International Institute for Particle Astrophysics (AstroCeNT).

The APC Laboratory mourns the loss of George Smoot, who passed away unexpectedly at his home in Paris. George Smoot was one of the pioneers of observations of the cosmic microwave background (CMB), which revolutionized our understanding of the cosmos and placed cosmology on a firm experimental footing. (Credits photo: Peter Badge/Lindau Nobel Laureate Meetings)

Scientists from APC are among the researchers worldwide honored with the 2025 Breakthrough Prize in Fundamental Physics, awarded to the ATLAS Collaboration at CERN's Large Hadron Collider (LHC) alongside its sister experiments ALICE, CMS and LHCb
 

In February 2023, the KM3NeT experiment detected a very high-energy event, KM3-230213A, which was identified as a muon of approximately 120 Petaelectronvolts.