The Large Hadron Collider (LHC) is currently shut down for a major two-year upgrade programme. However, LHC researchers are busy analysing the large dataset they have collected during the machine’s second run (Run 2), which took place between 2015 and 2018. The ATLAS collaboration at CERN has now released its very first result based on this dataset. The result sets bounds on so-called grand unified theories, which might fill important gaps in the Standard Model of particle physics.