Visual narratives, such as comics and animations, are becoming increasingly popular as a tool for science education and communication. Combining the benefits of visualization with powerful metaphors and character-driven narratives, comics have the potential to make scientific subjects more accessible and engaging for a wider audience. While many authors have experimented with this medium, empirical research on the effects of visual narratives in science communication remains scarce. This review summarizes the available evidence across disciplines, highlighting the cognitive mechanisms that may underlie the effects of visual narratives.