Peter Higgs, who proposed the existence of the 'God particle,' has died at 94

FILE - Britain's Professor Peter Higgs smiles during a press conference in Edinburgh, Scotland, on Oct. 11, 2013. The University of Edinburgh says Nobel prize-winning physicist Peter Higgs, who proposed the existence of the Higgs boson particle, has died at 94. Higgs predicted the existence of a new particle — the so-called Higgs boson  — in 1964. But it would be almost 50 years before the particle’s existence could be confirmed at the Large Hadron Collider. Higgs won the 2013 Nobel Prize in Physics for his work, alongside Francois Englert of Belgium. (AP Photo/Scott Heppell, File)

Nobel prize-winning physicist Peter Higgs, who proposed the existence of the so-called “God particle” that helped explain how matter formed after the Big Bang, has died at age 94, the University of Edinburgh said Tuesday.

The university, where Higgs was an emeritus professor, said he died on Monday following a short illness.

Higgs predicted the existence of a new particle, which came to be known as the Higgs boson, in 1964. He theorized that there must be a sub-atomic particle of certain dimension that would explain how other particles — and therefore all the stars and planets in the universe — acquired mass. Without something like this particle, the set of equations physicists use to describe the world, known as the standard model, would not hold together.