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Since the first pioneering balloon flight undertaken in France in 1783, aerial ascents became an ordinary show for the citizens of the great European cities until the end of the XIX century. Scientists welcomed balloons as an extraordinary device to explore the aerial ocean and find answers to their questions. At the same time, due to the theatricality of ballooning, sky became a unique stage where science could make an exhibition of itself. Namely, ballooning was not only a scientific device, but a way to communicate science as well. Starting from studies concerning the public facet of aerial ascents and from the reports of the aeronauts themselves, this essay explores the importance of balloon flights in growing the public sphere of science. Also, the reasons that led scientists to exploit “the show of science aloft” (earning funds, public support, dissemination of scientific culture…) will be presented and discussed.

Being aware of the fact that science is a decisive factor for development and individual well being and a citizen's right, no less important than all his other rights, Tunisia's new-Era initiated its Science City on 10 April, 1992. The purpose of such an institution is to disseminate science throughout the whole of Tunisia for the different categories of citizens and to help, in the context of dovetailing with the educational sector, youngsters get, from their earliest years, interested in science and its use.

In a meta-analysis carried out in 2002, the two main associations of science centres and museums (ASTC, mainly US-centered, and ECSITE, mainly European) gathered all studies analysing the impact of science centres and museums on their local communities1. Four types of impact were identified: personal, social, political and economical. It was noticed that the vast majority of studies concentrated on the personal impact (that is, learning outcome, visitor satisfaction, etc.), while the latter three were largely neglected. The very fact of pointing this out, and many recent experiences - some of which are included in this commentary - show that there is now a shift of attention.

ECSITE is the European network of science centres and museums (www.ecsite.net). The ECSITE Annual Conference, attended every year by several hundreds of professionals in science museums and science centres (870 at the last edition), and the ECSITE director forum, where full members of the association discuss on focused topics, are excellent observation points. Looking at what goes on in these meetings allows to track what is high on the agenda of the science-centre community, how the focus of interest moves, what are the main concerns of museum professionals.

What is the role of science museums nowadays? If we want to answer this question, we need to understand the historical period we are living and what role(s) museums can play. We are undoubtedly at the beginning of a new age based on a new relation between science and society, a concept which has been explained and repeated by sociologists and economists over and over again and is confirmed by statistics.

NASA has decided to cut by 50% the next two-year budget for the Astrobiology Institute (NAI), and for all of the studies on life in outer space. This reduction follows an announcement made by Dr Michael Griffin, the Administrator of the space agency of the United States Government when, in addressing the Mars Society last summer, he clearly stated that xenobiology studies are marginal to the mission of NASA.

What professional future awaits those who have attended a school in science communication? This has become an ever more urgent question, when you consider the proliferation of Masters and post-graduate courses that provide on different levels a training for science communicators in Europe and all over the world. In Italy, the International School for Advanced Studies of Trieste has been for fourteen years now the seat for a Master’s degree in Science Communication that has graduated over 170 students. This letter illustrates the results of a survey carried out in order to identify the job opportunities they have been offered and the role played in their career by their Master’s degree. Over 70% of the interviewees are now working in the field of science communication and they told us that the Master has played an important role in finding a job, thus highlighting the importance of this school as a training, cultural and professional centre.

Why should we care about science books? After all, we live in a "new media" world where students, researchers, and the public use the World Wide Web for all their information needs. Cutting edge research appears on "preprint archives" or "open access" online journals, text"books" appear as online sites with interactive presentations and links to presentation, for creating public discussion and dialogue, and even for archiving current research. In that kind of world, what’s the purpose of looking at "old fashioned" books?

Scientific publishing, here to be considered in a broader sense, as publishing of both specialised scientific journals and science popularisation works addressed to a wider audience, has been sailing for some years on troubled waters. To gather some possible food for thought is the purpose of this brief article.

The obvious thing to say about popular science publishing in the last twenty years is that there has been a lot of it! That is important in itself. But it also means it is hazardous to offer general comment. The British journalist and commentator Bryan Appleyard recently wrote in the Sunday Times that the “hard stuff” in science was no longer attracting so many readers. Books answering many small questions about the world, or evoking a sense of wonder, do better - he reckons - than those which offer large certainties based on a scientific, or scientistic view of the world. That type, Appleyard claims, dominated the field for years after Steven Hawking’s A Brief History of Time, with its promise of a theory of everything.