Live science events engage publics with science in a social context. This article articulates the aims and ethos of this growing sector within a research context. Semi-structured interviews (N=13) and focus groups (N=77) were conducted with event practitioners (both professional and volunteers) in the U.S.A. and U.K.. Inductive thematic analysis indicated that event producers aim to raise awareness of and professionalism in the sector. In particular, they seek to develop research into long-term impacts of events for both audiences and practitioners.

Science festivals (or just “festivals”) are currently ascendant in the United States with more than 40 new initiatives emerging in just the past 5 years, but their story is not so easily told. The schedule of any one individual festival may contain a staggering array of events, and each festival is different both from year to year, and from other festivals. One multi-festival evaluation points to potential strengths of the format, as well as the importance of the participation of STEM practitioners. Collaboration and social identity formation are considered as powerful festival impacts, and potential challenges for festivals are discussed.