The publication of the National Academies of Science consensus study, Learning Science in Informal Environments (2009), was an important marker in the history of informal STEM learning (ISL). With five years hindsight, we pause to reflect how far ISL has come as a field, what we have achieved, and what the future might hold. The impetus to do so came via our participation on a panel at a symposium at the 2014 NARST Meeting in Pittsburgh, PA. Our session was framed by overarching questions about the kind of research currently being conducted in ISL--and for what purpose. Some of the specific