Zooniverse citizen science projects have reached over 2.22 million people (1.4 million new people since August 2013). This impact includes changes of understanding and behaviour of members of the public providing classifications for over 300 different projects, as well as project use in formal and informal education, changes to the behaviour of researchers engaged in new research using citizen science methods, and changes internationally, particularly to environmental policy and disaster relief. Portsmouth has made major contributions to the underpinning and ongoing research for Galaxy Zoo, which was the foundation for the Zooniverse and led directly to its wide impact.