Cern scientists reporting in the UK and Geneva claim the discovery of a new particle consistent with the long-sought Higgs boson.
The particle has been the subject of a 45-year hunt to explain how matter attains its mass.
CMS, one of the two Higgs-hunting experiments at the Large Hadron Collider, has reached a level of certainty worthy of a "discovery".
The other experiment, Atlas, has yet to report its results.
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