The search is all but over for a subatomic particle that is a crucial building block of the universe. Physicists announced on Thursday that they believe they have discovered the subatomic particle predicted nearly a half-century ago, which will go a long way toward explaining what gives electrons and all matter in the universe size and shape.

The elusive particle, called a Higgs Boson, was predicted in 1964 to help fill in our understanding of the creation of the universe, which many theorise occurred in a massive explosion known as the Big Bang.