Axel Bruns is an Australian Research Council Laureate Fellow and Professor in the Digital Media Research Centre at Queensland University of Technology in Brisbane, Australia, and a Chief Investigator in the ARC Centre of Excellence for Automated Decision-Making and Society. His books include Are Filter Bubbles Real? (2019) and Gatewatching and News Curation: Journalism, Social Media, and the Public Sphere (2018), and the edited collections Digitizing Democracy (2019), the Routledge Companion to Social Media and Politics (2016), and Twitter and Society (2014). His current work focusses on the study of user participation in social media spaces, and its implications for our understanding of the contemporary public sphere, drawing especially on innovative new methods for analysing 'big social data'. He served as President of the Association of Internet Researchers in 2017–19. His research blog is at http://snurb.info/, and he tweets at @snurb_dot_info.