In this paper, we identify some milestones in the construction process for mobile science museums and centres in Brazil. As background for presenting the Brazilian context, we initially address the records found on the earliest travelling museum exhibitions and mobile museums in Europe and North America. We then introduce the role of UNESCO in the promotion and implementation of travelling science exhibitions and museums in several countries. Finally, we document important events in the history of mobile science museum and centres in Brazil and outline three general and inter-related challenges currently faced by them.

The future challenges within science communication lie in a 'grey area' where the frontiers between production and sharing of knowledge are blurred. An area in which we can satisfy at the same time and within the same activity the autonomous interests of researchers and those of other stakeholders, including lay publics. Settings are emerging, where we can provide real contribution to scientific research and at the same time facilitate the publics in their process of hacking scientific knowledge to serve autonomously defined and often unpredictable functions. Some are linked to research institutes, others to science centres, others are precisely inbetween. This editorial explores why these special places are needed, and present some case studies, leading to the need of interpreting science culture centres as research facilities.

This paper briefly describes a new academic discussion project first presented on November 29th, 2016, at the "Universum Sciences Museum" in Mexico City. Interdisciplinary professionals comprise the Museological Reflections Group (MRG), whose aim is to think and explore new possibilities for science museums. The group's first edition, offered the theme "The Sciences behind Showcases: Anthropological and Archaeological Processes".

In respect of the different modes of science communication including journalism, radio, online, I would propose that the process of making exhibitions and centres dedicated to science & technology is one of the hardest creative typologies. It also provides a very different type of engagement to other modes, in that it works in real time and space with real tangible objects and responsive media. The power of the real is also extended through the direct and collective involvement of people, providing a refreshing antidote to the potential alienating nature of social media and the ever-growing obsession with the virtual. In this paper I will discuss the skills required by a designer in order to solve the challenges contained within the client brief (the project document provided by the client), and therefore the skills a proper exhibition designer training programme should deliver.

The profession of explainer is still pretty much undefined and underrated and the training of explainers is many times deemed to be a luxury. In the following pages we make the argument that three main factors contribute to this state of affairs and, at the same time, we try to show why the training of explainers should really be at the core of any science communication institution. These factors are: an erroneous perception of what a proper scientific training means for explainers; a lack of clear definition of the aptitudes and role of explainers required by institutions that are evolving and diversifying their missions; and an organizational model based on top-down practices of management and activity development which underappreciates the potential of the personnel working directly with the public.

This commentary seeks to spark further discussion on the continuing professional development in science communication, presenting comments from practitioners who were asked to reflect on the competences and skills their profession requires, and to envisage what kind of training might provide them. This introduction presents some common issues that emerge within the comments: the necessity to face rapidly evolving professional landscapes, to answer to new missions and roles, to consider the growing impact and potential of new technologies. Alternative training methods are also discussed.

The letter compares and contrasts thinking about making science accessible and relevant to children in science centres and museums with thinking about communication in social history museums.

This study aims to investigate whether different types of museum visits have specific ways to influence the visitors' experience and learning. Three types of museum visits as offered by the Museo della Scienza e della Tecnologia "Leonardo da Vinci" in Milan, Italy were taken into consideration: free tour, guided tour, and lab. The study involved visitors over 25 years of age. The way visits took place, the visitors' learning and experiences were investigated based on evidence collected using methods such as Personal Meaning Mapping and observation. Our study has revealed that the outcomes of the visits vary in terms of visitor experience and depth of knowledge on the main subject. No significant differences were found as concerns the level of attention (visitors proved to be attentive while at the museum regardless of the type of visit).

Teaching mathematics in informal settings is a relatively new phenomenon, but it has gained more attention due to the recent changes in the society. The aim of the present quantitative study was to compare the learning outcomes of Latvian and Swedish 12-year-olds when they visited a science centre mathematics-art exhibition originally designed in Estonia. The results showed that in general, prior knowledge of the exhibition contents was the strongest predictor of post-test results in both countries but that mathematical thinking skills and self-concept had a small added value in explaining the post-test results. The results of the study give some of the first pieces of evidence of the effectiveness of out-of-school mathematics teaching in a science exhibition context, providing a good basis for further studies.