Belgian theoretical physicist François Englert, the only Belgian ever to win the Nobel Prize in Physics, has died at the age of 93. Englert received the prize in 2013 for his work in the 1960s — developed alongside close collaborator Robert Brout — predicting the existence of a fundamental particle that gives matter its mass, now known as the Brout-Englert-Higgs boson or Higgs boson. The theory was dramatically confirmed some 50 years later in 2012, when the particle was detected at CERN's particle accelerator (the European Organisation for Nuclear Research, based on the Swiss-French border near Geneva).