Between February and June 2008, the Hall of Human Life content development team set out to create goals, messages, and content ideas for a new exhibition on human life. During this time period, the team decided that the exhibition would focus on the main message that Humans are changing and provide the visitors with three lenses for viewing the exhibition: an ecological lens, an anatomical lens, and an evolutionary lens. As an entry point to these lenses for visitors, the exhibit team generated five catalysts that correspond to the ecological lens and highlight how environmental factors can