Joao is the chief troublemaker at the CERN Media Lab. He has a background in physics but spends most of his professional time conceiving interactive applications for science visualisation and education. One of his main strategies for science communication is the creation of visual and personalized metaphors for complex concepts of science. Over the last few years, Joao has been key in establishing state-of-the-art multimedia installations for science centres and visit points at top research institutions. He regularly collaborates with artists developing science-inspired pieces, coaches scientists on public outreach and mentors many students. His latest big side project is “Phantom of the Universe” (http://phantomoftheuniverse.com/), a planetarium show about Dark Matter nearing completion.