Humans have long wondered about life in the universe. Are we alone? Is Earth unique? What is it that makes our planet a habitable one, and are there others like Earth? NASA’s Kepler Mission seeks the answers to these questions. Kepler is a space-based, specially designed 0.95 m aperture telescope. Launching in 2009, Kepler is NASA’s first mission capable of finding Earth-size and smaller planets in the habitable zone of other stars in our galaxy. Therefore, the Kepler Mission provides an opportunity for interdisciplinary science teaching, as it combines Earth and space science with life sciences. Teachers and students can bring this mission down to Earth by using the accompanying poster, partaking in classroom activities, and visiting the mission’s website (see “On the web”).