Citizen science projects offer a new form for the engagement of citizens in scientific research. In this session we will explore the opportunities and challenges of this emerging area by looking at different case studies covering a wide range of scientific disciplines and approaches. We will use examples from the Socientize project, and present case studies involving collective music experiments, climate risk assessment, environmental monitoring and citizen cyberlabs. The presentations will lead to what we expect to be a lively discussion on the future of citizen science in science communication.