This issue of JCOM explores the question ‘what works in science communication?’ from a variety of angles, as well as focusing on the politically sensitive topic of climate change. In addition, the issue contains a set of commentaries that explore the sometimes conflicting roles of universities in science communication.

What is it that really makes communicating science a good, moral thing to do? And are there limits to the potential ‘goodness’ of science communication? In this article, we argue it is time we consider what an ethics of science communication might look like. Not only will this help us figure out what doing the right, moral thing might be. It also invites us to think through one of the most perplexing, challenging and pressing question for this still emerging field: what are the core unifying features of science communication?

Science communication is today a well-established ―although young― area of research. However, there are only a few books and papers analyzing how science communication has developed historically. Aiming to, in some way, contribute to filling this gap, JCOM organized this special issue on the History of Public Communication of Science and Technology (PCST), joining 15 contributions, from different parts of the globe. The papers published in this issue are organized in three groups, though with diffuse boundaries: geography, media, and discipline. The first group contains works that deal descriptively and critically with the development of PCST actions and either general or specific public policies for this area in specific countries. A second set of papers examines aspects of building science communication on TV or in print media. The third group of papers presents and discusses important PCST cases in specific areas of science or technology at various historical moments.

The future challenges within science communication lie in a 'grey area' where the frontiers between production and sharing of knowledge are blurred. An area in which we can satisfy at the same time and within the same activity the autonomous interests of researchers and those of other stakeholders, including lay publics. Settings are emerging, where we can provide real contribution to scientific research and at the same time facilitate the publics in their process of hacking scientific knowledge to serve autonomously defined and often unpredictable functions. Some are linked to research institutes, others to science centres, others are precisely inbetween. This editorial explores why these special places are needed, and present some case studies, leading to the need of interpreting science culture centres as research facilities.

Reflecting on the public role of academics, this issue of JCOM includes a set of commentaries exploring public intellectuals and intellectualism. The commentaries explore the role of academics in public debates, both as bringers of facts and passion. These pieces, together with past commentaries and letters to JCOM raise interesting questions about the role of academics in public debates that are, perhaps not those usually trodden in the academic literature.

This issue sees the publication of several papers that contribute to our understanding of the challenges faced by researchers in communicating about their research, adding richness to our understanding of practices and policies in Zimbabwe as well as amongst non-Anglophone speakers working in Australia. The potential of incorporating documentary filmmaking tools and techniques into open science projects raises interesting questions about subjectivity, data and the collaboration skills needed for today's scientists.

This issue of JCOM presents some interesting challenges relating to trust and the media ecology that supports science communication. Weingart and Guenther have organised a set of commentaries considering the issue of trust and media from different points of view, by asking for responses to their paper 'Science Communication and the Issue of Trust'. The commentaries focus on traditional and social media and the actors that contribute to media content, though they do not consider 'paid for' content (also known as advertising), which is the subject of a paper by Silva and Simonian also published in this issue of JCOM.

Looking back over the past 5 years of articles published in JCOM, this editorial looks at the topics covered and the geographies represented and asks: are we tackling all main contemporary issues in science communication/popularisation or public engagement? It invites you to contribute with your papers, letters, essays and news to help address the holes in our coverage and to enter into dialogue on our Facebook page.

This issue forms Part II of JCOM's collection of articles and essays exploring the field of citizen science. Here I introduce the articles in Part II, outlining how they contribute to our understanding of the ways that volunteers participate in citizen science projects, what motivates this participation and what learning arises as a result of participation.

The academic journal paper has been around for several hundred years and during that time has seen shifts in style and structure. This editorial explores the traditional research paper and considers whether thinking about the research paper as a story, provides insights into style and structure that would make research both more transparent and more readable.