Gregory Crocetti is a non-Indigenous microbial ecologist, science educator, writer, advocate for microbes and Director of Scale Free Network: art-science collaborative. His PhD and subsequent post-doctoral research explored the roles of different populations of bacteria in a range of environments, including those found in sponges, seaweeds, stromatolites and sewage. Since 2007, Gregory has collaborated with artists and educators to design and deliver a vast range of art-science workshops, exhibitions and participatory installations for diverse audiences, with a view to visualising the invisible. In recent years, he has also co-created several award-winning picture books and graphic novels about microbes and their symbiotic partnerships with larger life-forms.