October 7, 2014
Over the course of the past 30 years, the way groups form and operate in experimental particle and nuclear physics has seen major transformations, all in the same direction. The numbers of people and the numbers of institutions involved in any given project have risen. The numbers involved in each of the major experiments at the Large Hadron Collider at CERN have reached about 3,000 physicists, and many tens of institutions, many countries. This explosion makes experiments like DZero or CDF at the Fermilab Tevatron look quite modest, although at the time of the discovery of the top quark, nearly 20 years ago, a little competition we ran found 40-odd native languages among the 400 collaborators.