Historical background The BBC Radio Science Unit has its roots in two radio networks, going back more than 40 years. In the late 1950s, BBC External Services (now World Service), appointed a science correspondent and began a weekly science magazine programme. Initially called `Science and Industry', it changed its name in about 1964 to `Science in Action'. It is still running today, after more than 2000 editions, probably making it the longest running science show on radio.

What makes a science story? Behind the scene there are many choices: what, how and when to broadcast. Decisions are made according to the general criteria of news values to which we add two groups: personal and emerging criteria. General criteria of choices are news values for the science stories. According to Tonner, stories containing human interest are important in everyday life, report less complicate discoveries and science as a part of the broader subject comes to the media easily.

Contemporary radio is under-studied by academic researchers, while on the contrary it expresses great exigencies of knowledge. Media studies examined deeply radio when it was the mainstream medium, i.e. in the Thirties, especially in the US also for marketing needs of a largely commercial broadcasting system.

The international symposium Science on air: the role of radio in science communication was held in Trieste on 1 and 2 October, 2004. To our knowledge, it is the first conference ever specifically held on science in radio, and it is certainly the first time science radio journalists, researchers, and media experts from 16 different countries met to discuss their journalistic practice and the role of radio in science communication. The main results are presented in this section.

A word of warning for scientists: don't appear on talk-shows. Not only would you probably run into a magician, you might even be mistaken for one, which is much worse. And do not ask the press, the radio and television to put their magical mentality aside: the media are condemned to it. It is not just a matter of what the audience wants. It is the cause-effect relations the media constantly have to establish that have per se something "magic".

This study analyses the image of Italian space activities given by national dailies in the period from February 2001 to July 2002, in order to understand Italians' view of "Italy in space". It also considers the role that space scientific research can play in the communication strategies of Italian space activities in the upcoming years and the possible ways to improve its image through mass media.

Terms such as gmo, genetic tests and pharmacogenomics, which were once used only by experts, belong today to everyday language. The new vocabulary of molecular biology shows an increase in the interest of society in scientific problems, and in particular the recent cultural supremacy of molecular biology. For all of us, the gene symbolizes progress and power, the hope of fighting incurable diseases, and the fear of terrifying genetic manipulations. These aspects become real events and characters in the Human Genome Project. But this great international project has also shown that the relation between science and society is changing. This event can actually be seen as a metaphor of science leaving academic laboratories to settle new areas of society. From economics to sociology, from epistemological discourse to bioethical debate, from medicine to basic research, in all these fields genome becomes the main topic of discussion and food for thought. Public attention to this international project has grown constantly throughout its development, and it peaked when science came into contact with the press.

This article presents the results of a study carried out in Italy by the Permanent Observatory on science communication through the media. The aim of this research project coordinated by the staff of the Master’s Degree in Science Communication, ISAS, Trieste, in collaboration with Ilesis S.r.l., Rome, is to monitor and analyse systematically the amount of scientific information on TV and in the press.