Communication through social media is a phenomenon whose relevance has involved the consideration of online discourse in the language teaching context. This article explores the functionality of Twitter (now called "X") for science dissemination within the teaching and learning of English as a foreign language. To do this, 100 tweets from the accounts @WWF and @Greenpeace were gathered and analysed from the perspective of digital discourse analysis and communicative language teaching. I argue that using these tweets encourages the development of key competencies, provides room for the practice of integrated skills, and enhances the application of 21st-century skills. Conclusively, science dissemination tweets may be considered adequate for teaching and learning English.