Students connect to science in multiple ways. For some students, learning how real people have developed and defended their scientific ideas makes science relevant and interesting. Tracking the changes in scientific thought over time can be fascinating for students as they see how scientists based their growing understanding on empirical data that became more extensive with each new wave of technology. Students also discover that the process of accepting new explanations is often fraught with controversy. In this interdisciplinary activity, students develop a timeline that uses posters to show how scientists’ explanations of our solar system and the universe have changed over time.