Podcasts are gaining traction in academic practice and debates. This article reflects on the experience of “The Sources of the Nile”, a podcast on media, science, and water diplomacy. By presenting the podcast structure and production process, we sketch a “podcast pathway” that might serve as a guide for others. We share the results of a survey conducted among our listeners and we review the episodes discussing what we learned on distributions of voice, knowledge and water in the Nile basin. We conclude by reflecting on the connection between the technical production of the podcast and the type of knowledge that it generates, and by pointing at the importance of placing the podcast within a broader community of interests and practice.

Science and theatre have a long history of interactions, which usually promote collaborations between artists and scientists. Focussing on the theatre performed in the context of science communication, this article aims to analyse the collaboration between artists and scientists in the production of the play ‘Life of Galileo’, by Bertolt Brecht, at the Museu da Vida. Based on the interviews with 12 people involved in the production, we identified a strong involvement in the project, which provided a rich exchange and knowledge acquisition, in addition to raising relevant questions about the theatre performed in the specific context of science communication.

Despite Mexico has coasts in the Pacific and Atlantic oceans, people's connection towards the sea and marine environments is quite poor. Our commentary focuses on Mexico's coral reefs, relevant tropical ecosystems to human and oceanic welfare, and it emerges from the experience of the production of an itinerant coral reefs exhibit in Mexico, committed to the conservation and awareness of this threatened habitat. The UN Decade of Ocean Science for Sustainable Development starts in 2021 and represents an opportunity to increase initiatives for public communication of science on marine and oceanic issues in Mexico and the world.

This research aimed to analyze the quality of the information conveyed through YouTube videos in Portuguese on the use of two medicines suggested for the treatment of COVID-19: chloroquine and hydroxychloroquine. The ‘Brief DISCERN’ questionnaire was applied to assess the quality of the video content as well as baseline characteristics, such as length, views, likes and dislikes, in a total of 90 videos with almost 4,5 million views. Traditional media accounted for 58,89% of videos. Misleading information was present in most of the videos (63,5%). Despite the ease of access, the videos showed problems in the quality of information.

In this article, we analysed the 100 most engaging contents about COVID-19 on social networks in Brazil, in March 2020, when the disease officially arrived in the country. Within the infodemic context, we analysed the accuracy of the information and the reliability of the websites that guided the debate. Our results show that misinformation/disinformation accounted for 13.5% of the sample and that their average engagement was greater than the one for the information that could be verified in other sources and in accordance with scientific evidence. We also found that professional websites, especially journalistic ones, predominate among sources. The results point to the need to combine science communication strategies with network communication dynamics.

As successive studies have shown that chloroquine and hydroxychloroquine are ineffective in treating COVID-19, this article investigates how the Brazilian president, Jair Bolsonaro, disputes the truth around science to convince the population that these drugs can save lives, preserve jobs and restore economic growth. Using Charaudeau's theory [Charaudeau, 2007, 2010} as a methodological framework, as well as understanding that right-wing populism has embodied post-truth communication as a distinctive feature of contemporary politics, we observed Bolsonaro's weekly Facebook live streams — known as ‘lives’ — for 14 weeks, identifying them as a communicative device that offers Bolsonaro the material conditions to interact directly with his public. Finally, we structured our analysis according to the three most common themes — questioning delays due to an insistence on scientific methodology, overvaluation of personal experiences and emphasis on individuals' freedom of choice — to observe the emotional images and discursive scenarios the Brazilian president stages to produce the intended pathemic effects of his discourse: hope and urgency; trust and distrust; freedom and polarization.

For many decades, NGOs and social movements have acted as “alternative” science communicators. They have made strategic use of science to promote their ideological stances, to influence political and/or economic decision-making and to motivate civic action. To date, however, our understanding of science communication in activism has received little critical attention. This set of commentaries acts as a starting point for further research and reflection. The different cases and perspectives urge readers to consider the impact, democratic legitimacy, and relevance of alternative science communication, and the challenges that alternative science communicators pose for science communication and society.

Often, new social movements engaged with science and society are characterised as contesting objectivity; the neutrality of modern science seeking to legitimise ‘lay perspectives’. It has been an article of faith among scholars to view third world movements as anti-science, anti-modernity and post-developmentalist. This commentary describes ideological framework, modes of action and organisation of the All India People’s Science Network (AIPSN), one of the People’s science movement (PSMs) active for more than the past four decades. They dispute the dominant development trajectory and science and technology-related policies for reinforcing the existing inequities. Nevertheless, they see ‘science’ as a powerful ally for realising their radical emancipatory vision of ‘science for social revolution’. Mobilising ‘science activists’ as unique alternate communicators, they strive for lay-expert collaboration. The canonical framing of third world social movements as postcolonial and anti-modern does not capture this unique case from India. Further studies are required to tease out such strands of social movements elsewhere.

Environmental NGOs play a vital role in public climate communication through their awareness-raising activities and educational campaigns. This commentary points to a potentially problematic implication of their role as climate science advocates which includes the general tendency to attribute environmental changes and extreme weather events to climate change. These climate-centric framings, however, may not resonate with the lived experiences and belief systems of local communities, not even in geographically vulnerable areas. I draw on local case studies to show that communities often express a sense of “shared responsibility” between global carbon dioxide emissions and ecologically deleterious local practices such as shrimp farming (in Bangladesh) and cutting trees (in the Philippines). As a consequence, the studies show mismatches between activists' attributions of local circumstances and events, and local communities' ways of knowing their local circumstances.

This book review considers the contribution of Communicating Science, A Global Perspective to our understanding of the history of science communication across the globe. With 40 chapters and nearly 1000 pages of text, this substantial book provides insights into the unique histories of science communication in 39 countries across all regions of world.