The South African Journal of Science is a multidisciplinary science journal published bimonthly by the Academy of Science of South Africa. Our mandate is to publish original research with an interdisciplinary or regional focus and to provide a forum for discussion of news and developments in research and higher education. About the cover: “… a revolution that is fundamentally changing the way we live, work, and relate to one another. In its scale, scope and complexity… is unlike anything humankind has experienced before.” These are the words of Klaus Schwab speaking about the Fourth Industrial Revolution (4IR). In his article, Moll states that the ‘technologies of the 4IR’ are merely evolutions of the 3IR and not groundbreaking inventions of contemporary times. In their responses to Moll’s article, Marwala and Ntlatlapa argue for the existence of the Fourth Industrial Revolution. Other articles include: Nanoproducts in SA / COVID-19 and students’ mental health / Taking science communication to the classroom.