Hundreds of events all over Italy, nine national projects, more than 100 cities involved, thousands of researchers and a lot of curiosity: these are the main ingredients of the “European Researchers’ Night” that returned this year on the last Friday of September.Held for the first time in 2005, supported by the European Commission, the “white night” of research has become an eagerly awaited event. It also represents an important occasion for meeting and exchanging ideas between researchers and citizens who are passionate about science or just curious. INFN is participating in five of the projects financed by the European Commission in Italy: Sharper, Society, Bees, Bright and ERN Apulia.Thanks to the active presence, at a local level, of national divisions and laboratories, the INFN community has thus been one of the event’s protagonists. INFN organised initiatives all over Italy for 27 September: open labs, meetings, conferences, seminars, shows, experiments, interactive games, aperitifs, concerts, and much more