Scientists at Cern will announce that the elusive Higgs boson 'God Particle' has been found at a press conference next week, it is believed.
Five leading theoretical physicists have been invited to the event on Wednesday - sparking speculation that the particle has been discovered.
Scientists at the Large Hadron Collider are expected to say they are 99.99 per cent certain it has been found - which is known as 'four sigma' level.
The Higgs boson is regarded as the key to understanding the universe. Physicists say its job is to give the particles that make up atoms their mass
Without this mass, these particles would zip though the cosmos at the speed of light, unable to bind together to form the atoms that make up everything in the universe, from planets to people.
The collider, housed in an 18-mile tunnel buried deep underground near the French-Swiss border, smashes beams of protons – sub-atomic particles – together at close to the speed of light, recreating the conditions that existed a fraction of a second after the Big Bang