This paper contains an overview of the programmes currently existing in Latin America to train science communicators. For such purpose, only postgraduate courses held regularly were considered in the study. Twenty-two programmes meeting such requirement were identified in five countries, 65% of which were in fact established over the past ten years. They present a lot of diversity in terms of admittance requirements, goals, contents, approaches, duration and graduation requirements. However, all of them share the same effort, aiming to offer specific contents in the area of science communication.

This article presents some of the challenges faced in developing an interactive exhibit on nanoscience and nanotechnology in Brazil. Presenting a scientific-technological area which is still in formation and which is little known by the population leads to a (re)consideration of the role of museums and science centers in the conformation and consolidation of scientific practice itself. Museographically, the exhibit deals with the challenge of making matter visible in an expression which is distant from the human perception. Some reflections are presented here on the option of musealization chosen which come from a broader evaluation of the exhibit.