For the ninth consecutive year, Jot Down Science was held. This year the event, organized by the LSC, was held at the Palacio de Congresos de Jaca and its main theme was “The Invisible”: the cross-cutting theme of the presentations, round tables and the science popularization contest with four €1,000 prizes for the best science popularization essay, the best science fiction narrative text, the best scientific illustration and the best scientific photograph. The prizes were sponsored by the Donostia International Physics Center, the Canfranc Underground Laboratory, the Bergara Laboratorium and the University of Seville, respectively.