If one of aims of science today is to respond to the real needs of society, it must find a new way to communicate with people and to be acquainted with their opinions and knowledge. Many science museums in Europe are adopting new ways to actively engage the public in the debate on topical scientific issues. The Museum of Science and Technology "Leonardo da Vinci" in Milan (partner of the SEDEC project) has thus experimented some formats for dialogue with teachers and with the public in general. Our experience shows that museums can be places where science and the public on the one hand and democracy on the other meet.

In the Rafael Nieto Auditorium of the National Autonomous University of San Luis Potosi Mexico, few chairs are empty. The room is full of Astrophysics professors, Solid State of Matter, Elementary Particles, Fluid Mechanics, etc. It is the 49th National Congress of Physic. Today ­extraordinarily- it has slip into the program an analysis round table about the new outlines in science museums in Mexico.

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.

For the purpose of this article, Science & Society (S&S) is referred to as that current of thoughts and those cultural initiatives aimed at fostering dialogue between research, scientific and technical output on the one hand and society on the other, so as to allow people to make conscious decisions about science and the sustainability of its developments. This concept underlies the elaboration of the MUSE cultural concept, the new Science Museum in Trent, Northern Italy.

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.

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.

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.

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.

In their contributions to this special issue, the British science writer Jon Turney and the American scholar Bruce Lewenstein discuss the validity of the book as a means for science communication in the era of the Internet, whereas the article by Vittorio Bo deals with scientific publishing in a broader sense.

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.