The past decade has witnessed a sustained growth in the scope and scale of participation of general public in all aspects of scientific research, including research questions formation, observations recording, data analyzes, and using the resulting knowledge. "Around the globe, thousands of research projects are engaging millions of individuals—many of whom are not trained as scientists—in collecting, categorizing, transcribing, or analyzing scientific data. These projects, known as citizen science." The term is relatively new - it entered the Oxford English Dictionary in June 2014 as "scientific work undertaken by members of the general public, often in collaboration with or under the direction of professional scientists and scientific institutions." We are currently facing a paradigm shift: currently the scale and scope of citizen engagement makes the phenomenon a significant tool for scientists and policymakers. We need to find the potential impact that citizen science can have on policy formation and implementation. For the challenges that the today's societies are facing it could provide some new answers and solutions, as it allows to tap into the vast resources of collective knowledge, allows collaboration beyond institutional boundaries, as well as between members of the public and professional scientists.