Editorial – 2015, a contrasted year

2015 is coming to an end, and with it, the International Year of Light 2015 with numerous closing ceremonies around the world, after a very successful and colorful year launched last January in Paris. ‘Our life depends on Light’ stated Irina Bokova, Director General of UNESCO, in her introductory message to the delegates at the opening ceremony. The magic of light and the success of thousands of specific events have demonstrated the enthusiasm generated worldwide by this initiative. With over 100 partners in more than 85 countries, the IYL 2015 has been a global cross-disciplinary, educational and outreach enterprise, also celebrating a broad cultural heritage. It is well recognised that the science and applications of light will continue to generate many new technologies in health, communication, economy, environment and social areas, with a direct impact on the quality of our lives. I cannot avoid mentioning here the last issue of EPN, devoted to the science of light, as a tribute to IYL 2015, and this thanks to the dedication of Luc Bergé, chair of the Quantum Electronics and Optics Division.