The Science House of the Federal University of Rio de Janeiro (UFRJ) is a space where science is approached through the perspective of culture, seeking interdisciplinarity, stimulating debate among different areas of knowledge, and building a closer and more pleasant relationship between society and scientific knowledge.  Work with mediators has gone through significant changes over time and the paths chosen have been modified, re-evaluated and transformed.  The presence of mediators can mean the possibility of dialog, conversation, informal chat, and sharing.  It has been one of the main channels of communication with the general public.

The creation of a scientific culture through the experiences that can be offered in a museum is the central theme in the training of guides at Universum. Emphasising the social importance of science democratisation, providing the public with the chance to enjoy science itself, conceiving it as a human creation of extreme beauty, giving it the chance to be appreciated and enjoyed, presenting it from the different fields where an approach to it is possible, is something difficult to achieve outside a science museum and impossible without the intervention of the anfitriones.

Explainers have a longstanding presence in science museums and centres, and play a significant role in the institutions’ educational agenda. They interact with the public, and help make visitors’ experiences meaningful and memorable. Despite their valuable contributions, little research attention has been paid to the role and practice of these individuals. From the limited research literature that does exist, we know that museum educators employ a complexity of skills and knowledge. We also know such educators have a variety of experiences and qualifications – this creates a rich diversity within the field. Finally we know that the content and quality of programmes designed to educate novice explainers vary across institutions. Should we work toward a shared identity across institutions? Or even a “professionalization”? The paper explores the state of the art of the discussion around that questions.

In 2008 two collections were published: the Handbook of Public Communication of Science and Technology, edited by Massimiano Bucchi and Brian Trench, and Communicating Science in Social Contexts: New models, new practices, edited by Donghong Cheng and five other scholars from China, Canada, Belgium and Australia. These books try to define and draw the boundaries of science communication’s field from both a theoretical and empirical point of view. But do we need to establish it as a distinct research field? For a number of decades, a growing community of scholars and communicators is trying to reply positively to this question, but the need to look outside the disciplinary boundaries, to other academic fields, is still vital.

Peer training provides Explainers with the knowledge, skills and confidence to facilitate high quality interactions with visitors. These are skills that carry into their academic, personal and professional lives. Explainers report better grades in school, improved communication skills and better understanding of diverse learning styles. By devoting this high level of time and attention to this valuable resource, we can truly see the significant influence the science center can have on this most valuable, and often underserved, museum audience.

Human health has currently to face a growing series of global issues. From the spread of HIV/AIDS to a fresh outbreak of tuberculosis, increasingly drug-resistant, the world is witnessing a return, mostly unexpected, of infectious diseases. At the same time, the economic growth in many regions of the globe is generating a sort of “epidemics of wellbeing diseases”: obesity, diabetes, heart disease.

The Exploratorium explainer program is not only important to the young people involved, but is an integral part of the museum culture. This initiative that started to help the youth of our community has blossomed into a program that has been very helpful to the science centre. In fact, the institution would not be complete without the fresh energy of the explainers. They help the Exploratorium to continue to give the real pear to its public.

The knowledge deficit model with regard to the public has been severely criticized in the sociology of the public perception of science. However, when dealing with public decisions regarding scientific matters, political and scientific institutions insist on defending the deficit model. The idea that only certified experts, or those with vast experience, should have the right to participate in decisions can bring about problems for the future of democracies. Through a type of "topography of ideas", in which some concepts from the social studies of science are used in order to think about these problems, and through the case study of public participation in the elaboration of the proposal of discounts in the fees charged for rural water use in Brazil, we will try to point out an alternative to the deficit model. This alternative includes a "minimum comprehension" of the scientific matters involved in the decision on the part of the participants, using criteria judged by the public itself.

In the globalisation era, arts have provided food for thought on “how latitudes became forms”, to stress again that now, at global level, one should no longer define art as a contemplation “space”, but as an “environment”, a place for experience. On the other hand, already when Bern saw the inauguration of the historic exhibition “When Attitudes became Forms” in 1969, people realised that the problem was lying in the behaviour, in the attitude, of making arts towards the world. Basically, the formalistic concept of self-referentiality in a work of art was to be overcome, and attention was to be paid to procedures and contexts. In search of a new humanism in contact with the natural universe.

Science magazines have an important role in disseminating scientific knowledge into the public sphere and in discussing the broader scope affected by scientific research such as technology, ethics and politics. Student-run science magazines afford opportunities for future scientists, communicators, politicians and others to practice communicating science. The ability to translate ‘scientese’ into a jargon-free discussion is rarely easy: it requires practice, and student magazines may provide good practice ground for undergraduate and graduate science students wishing to improve their communication skills.