From ATLASexperiment https://twitter.com/ATLASexperiment on Twitter: Happy #Higgsboson Discovery Day! Nine years ago today, the ATLAS Experiment and @CMSexperiment announced the discovery of the Higgs boson. Learn more about the key role this particle plays in our Universe: https://atlas.cern/updates/feature/higgs-boson https://twitter.com/ATLASexperiment/status/1411596148473839619/photo/1 https://chirp.cooleysekula.net/attachment/72396