PHYSICISTS are expected to confirm a major milestone in solving a decades-old puzzle about the nature of matter tonight.
The results of what scientists call an extremely important experiment will be announced simultaneously in Geneva and Melbourne - where the international High Energy Physics conference is taking place - from 5pm (AEST).
The findings may, or may not, confirm existing theories of the way the universe - and our world - are held together.
The European Organisation for Nuclear Research (CERN) has been leading the search for the Higgs boson, an elusive sub-atomic particle dubbed by some as the "God particle", which is believed to confer mass.
The Higgs has led scientists on a chase since 1964, when British physicist Peter Higgs helped lay the conceptual foundation for it.
Read more about what is potentially the most important scientific research in fifty years at ABC new online.