In this editorial, we reflect on our new roles as Editor-in-Chief and Deputy Editor of JCOM. We acknowledge the work of previous editors of JCOM, the Editorial Office and the wider JCOM community who have contributed to the success of the journal. We introduce the new Editorial Board and future directions for the journal, and we encourage suggestions from authors, reviewers and readers for taking the journal forward.

Participatory science communication featured in several sessions and individual papers at the 2021 online conference of the Public Communication of Science and Technology (PCST) Network. This coverage recognises the drive away from linear communication to more participatory forms of science communication. In this special edition we present practice insights, papers and essays that explore participatory science communication. These contributions explore definitions, processes and describe case-studies of participatory science communication which involve a variety of publics, from young school students to Indigenous groups to farmers. In this introductory editorial we reflect on the papers, describe the growth of a participatory approach as part of the continuing evolution of science communication; explore a definition for participatory science communication; and consider some of the key concepts and issues that emerged.

In this Editorial, I reflect on my time as Editor in Chief of JCOM and thank the community of scholars and practitioners who have helped to ensure the success of JCOM by generously contributing their time as reviewers, as well as authors and readers. This community has made my time as Editor in Chief rewarding and informative, as I have learned more and more about our diverse field. I am sure that JCOM will continue to grow and develop under the directorship of Michelle Riedlinger and Marina Joubert.

Over 500 delegates took part in the third international ECSA conference in September 2020. Across 30 sessions, as well as keynote talks, e-poster presentations and more informal settings, they discussed and debated a diverse range of subjects related to citizen science. This special edition of ‘JCOM’ brings together some of the central themes that were under the spotlight at ECSA 2020. Since ECSA 2020 has been one of the first examples of a conference that moved completely online, and it has been considered a big success, we also include the Conference Report, as supplementary material with this editorial.

Science communication continues to grow, develop and change, as a practice and field of research. The boundaries between science and the rest of society are blurring. Digitalization transforms the public sphere. This JCOM special issue aims to rethink science communication in light of the changing science communication landscape. How to characterize the emerging science communication ecosystem in relation to the introduction of new media and actors involved? What new practices are emerging? How is the quality of science communication maintained or improved? We present a selection of papers that provide different perspectives on these questions and challenges.

As COVID-19 continues its devastating pathway across the world, in this second part of the JCOM special issue on communicating COVID-19 and coronavirus we present further research papers and practice insights from across the world that look at specific national challenges, the issue of “fake news” and the possibilities of satire and humour in communicating the seriousness of the deadly disease.

The devastating effects of COVID-19 and the speed of both the scientific and medical response and the public information requirements about frontline healthcare work, medical advances and policy and compliance measures has necessitated an intensity of science communication never seen before. This JCOM special issue — the first of two parts — looks at the challenges of communicating COVID-19 and coronavirus in the early spread of the disease in 2020. Here we present papers from across the world that demonstrate the scale of this challenge.

There is a renewed interest amongst science communication practitioners and scholars to explore the potential of storytelling in public communication of science, including to understand how science storytelling functions (or could fail) in different contexts. Drawing from storytelling as the core theme of the 2018 conference of the Public Communication of Science and Technology (PCST) Network, we present a selection of papers, essays and practice insights that offer diverse perspectives. Some contributions focus on the cultural and structural qualities of science stories and its key success factors, while others explore new formats, platforms and collaborators in science storytelling activities.

Today, science and politics are in a complex status of reciprocal dependency. Politics is dependent on scientific expertise in order to adequately address highly complex social problems, and science is fundamentally dependent on public funding and on political regulation. Taken together, the diverse interactions, interrelations and interdependencies of science and politics create a heterogenous and complex patchwork — namely, the science-policy interface. The societal relevance for phenomena such as scientific policy advice, science governance or (politically fostered) science communication have been amplified by the developments of digitalisation and now call for new approaches to clarify the ambiguous relationships within the science-policy interface. This special issue aims to provide a platform for researchers to address communication at the intersection of science and politics from different angles. The research presented in the special issue, thus, aims to reduce the contingency of science-policy communication in its various dimensions and looks to spur further investigations into the science-policy interface.

The growing interest in citizen science has resulted in a new range of digital tools that facilitate the interaction and communications between citizens and scientists. Considering the ever increasing number of applications that currently exist, it is surprising how little we know about how volunteers interact with these technologies, what they expect from them, and why these technologies succeed or fail. Aiming to address this gap, JCOM organized this special issue on the role of User Experience (UX) of digital technologies in citizen science which is the first to focus on the qualities and impacts of interface and user design within citizen science. Seven papers are included that highlight three key aspects of user-focused research and methodological approaches. In the first category, "design standards", the authors explore the applicability of existing standards, build and evaluate a set of guidelines to improve interactions with citizen science applications. In the second, "design methods", methodological approaches for getting user feedback, analysing user behaviour and exploring different interface designs modes are explored. Finally, "user experience in the physical and digital world" explores crossovers with other fields to improve our understanding of user experiences and demonstrate how design choices not only influence digital interactions but also shape interactions with the wider world.