In a brief article published by Science1 last October, British scientists stated that the expression "Public Understanding of Science" (PUS), which was traditionally employed in Anglosaxon societies to refer to the issue of the relationship between science, technology and society, is out-of-date. It should be replaced by "Public Engagement with Science and Technology" (PEST), a new acronym that clearly invites to reconceptualise the relationship between science and the public. The new approach involves the engagement of the public or rather the publics of science, through dialogue, in particular through an open and equal-to-equal discussion between scientists and non-experts that would enable non-experts to become the actual protagonists in the scientific decisions producing social effects.

Compared to expert-to-expert - or peer-to-peer - communication, the language of popular science is characterised by a wider use of figurative devices. This applies to all forms of verbal and non-verbal communication. Specialized texts are characterised by a restricted and rigorous lexicon both in spoken and - even more so - in written language. Namely, a widespread use of terms which are monosemic, unambiguous and non context-dependent terms, and a minimum amount of natural linguistic choices. The few polysemic, ambiguous and context-dependent words encountered in a scientific text are highly functional, since meaning is mainly conveyed through field-specific terms. The same rules apply to the iconography of a scientific text, where most pictures are graphs, diagrams or schemes. Their purpose is to give the reader a visual photo-like equivalent of the concepts discussed in the text. These images are all the more effective thanks to the use of colours, external references, highlighting and other devices, which make them functional to their explanatory purpose.

In recent weeks, Britain's Better Regulation Task Force report on scientific research regulation asked the Government to evaluate the risks associated with the development of Nanosciences and Nanotechnologies. The Government was also asked to prove its implementation of a specific policy to protect human, animal and environmental safety, were it to be threatened by the development of this emerging field of knowledge. These requests may sound rather alarming.

In the last few years, a continuous series of food alerts have caught the attention of the media and the public in Europe. First, eggs and pork contaminated with dioxins; then, "mad cow" disease, while, all along in the background, a battle against genetically modified plants has been in progress. These food alerts have had complex repercussions on the perception of risks associated with food production. Experts have often been divided over these issues, and the uncertainty of scientific data has been indicated on more than one occasion as one of the factors that influence risk perception. However, the most important factor seems to be undoubtedly the way in which the risk has been communicated (or not communicated) to the public. Therefore, risk communication analysis offers an excellent opportunity to understand the profound changes that are taking place in relations among the scientific community, mass media and other members of civil society now that they are fully aware that scientific and technological innovation, the real driving force of modern industrial society, is a source of development but also a source of risks which are not always acceptable. Within this different context, a debate open to all interested parties appears to have become a dire necessity for the "risk society", especially as far as food is concerned because food has extremely important psychological, ethical and cultural values.

Communicating modern biotechnologies is certainly no easy task. To tackle such a complex and future-oriented assignment, help may arrive, paradoxically, from the past, from ancient rhetorical tradition, and in particular from Aristotle, the most renowned rhetoric teacher of all time. In his Rhetoric, Aristotle suggested that to be persuasive speakers should make use of widely accepted opinions (endoxa), i.e. the common sense shared by all. Common sense is expressed in common truths and value-laden maxims. Common sense, however, is not flat but dialectical, in that it includes contrasting subjects. While reasoning, orators do not just passively report a conception of an unchanging world, but they reproduce the contrasting conceptions included in common sense. In the case of the debate about Biotechnologies, the contrasting conceptions can be found in the Natural/Artificial dualism, in the dichotomy between an attitude marked by obscurantism and suspicion of scientific and technological innovation and that of a scientistic attitude.

A survey has been recently carried out for the first time in Italy concerning science communication through the media and the result has been that science hits the headlines. It is often front-page news in the press and it is also often among the main points of the news on TV. This is not very surprising.

This work analyses how the theme of the creation of thinking machines by man, particularly through artificial intelligence, is dealt with on stage, with reference to three plays addressing different topics and characterised by different types of performance. This analysis reveals the particular effectiveness of plays dealing with scientific topics, when the relationship between theatre and science results in reflections transcending the boundaries of its contents to address man and his essence and gives voice to the ancient question of the sense of the world.

Enrico Fermi's work gave birth to a real cultural revolution in the Italian scientific scenario. His scientific studies concerned almost every field in physics and had far-reaching effects of which virtually everybody, above all in Italy, is still taking advantage. Two important "by-products" of Fermi's ideas and initiatives will be here taken into consideration: the new way of carrying out research and communicating science invented by Fermi and his group and his publications for the general public, which often stood for high examples of scientific popularisation. Then the focus will shift on Ettore Majorana's role to try to understand why his work in the field of communication within the School of Physics of Rome was basically non-existent despite the excellent communicative skills he demonstrated both during his university lectures ­ also published in this magazine ­ and in his article "Il valore delle leggi statistiche nella fisica e nelle scienze sociali", the only one which does not deal with pure physics issues and which will be also taken into account in this paper.