The blackboard is a somewhat legacy item that has disappeared from classrooms and meeting rooms, to be replaced by screens and whiteboards, except that is for physicists and Hollywood movies. Walking around CERN and peeking into rooms many still have blackboards covered in equations.In celebration of the Higgs, here are 15 physicists in front of their blackboards. The apotheosis of ‘blackboard craft' is possibly John Wheeler who used to pre-prepare very elaborate boards filled with colored diagrams. In the list I've tried to pick those which have some relevance to the development of the standard model: Feynman; Gell-Mann; Glashow or the eventual discovery of the Higgs, such as Higgs himself or important CERN luminaries such as my personal hero, John Bell, author of what has been called the most profound theory in physics: that if quantum theory is correct, then either things communicate instantly at a distance, or they don't exist when they aren't being looked at or both. Brownie points if you can say what the equations on the blackboards are, in the comments