Higgs boson was just a start for CERN's atom smasher – other mysteries await
The Large Hadron Collider will shut down for an overhaul in preparation for exploring questions of dark matter, extra dimensions and other universes.
In 2023, the ALICE experiment was ready for their best year yet, until a mysterious signal threatened everything. As the LHC wraps up its 2025 lead-ion run, physicists recall how they worked together to solve the puzzle.