The theory of evolution by natural selection has revolutionized the biological sciences yet remains confusing and controversial to the public at large. This study explored how a particular segment of the public - visitors to a natural history museum - reason about evolution in the context of an interactive cladogram, or evolutionary tree. The participants were 49 children aged four to twelve and one accompanying parent. Together, they completed five activities using a touch-screen display of the phylogenetic relations among the 19 orders of mammals. Across activities, participants revealed
Front-line educators are arguably critical to the visitor experience at museums and science centers across the country. However, little research exists to inform staff facilitation strategies or professional development efforts. In this article, we describe the results of a qualitative study of 63 staff-family interactions in a science center, focusing particularly on the role of adult family members.We observed three distinct phases of interaction, during which adult family members acted as gatekeepers to deeper staff engagement. The results suggest that in order to successfully facilitate