Scientists believe they have captured the elusive "God particle" that gives matter mass and holds the physical fabric of the universe together.
The Science & Technology Facilities council announced that CERN has found a new particle.
It has the properties of Higgs boson but will need verifying to check that it has all the properties.
It's been confirmed by CERN as a "5 sigma" level which means it's officially a discovery.
Professor John Womersley. chief executive of the Science and technology Facilities Council, told reporters at a briefing in London:
They have discovered a particle consistent with the Higgs boson.
Discovery is the important word. That is confirmed.
It's a momentous day for science
Scientists think the Higgs boson has been found, but what is it and for you and me, what does it all mean?
Scientists believe they have found the elusive "God particle" that gives matter mass and holds the physical fabric of the universe together
Researchers from CERN are due to announce the discovery of Higgs boson, an elusive particle which they think creates mass in the universe.