1 The Flagstaff Festival of Science is a FREE 10-day event occurring each fall with field trips, guided hikes, star parties, open houses, hands-on exhibits, presentations and archaeological excavations! Thank you all for yet another amazing festival! We Need Your Feedback! If you participated in any way in the 2019 Festival, we would love your feedback. Please follow this link to take a brief survey. Take Survey Calendar of Events E-News Sign Up SCI Talks, Keynotes, and Lunar Lectures Watch Charlie Duke's talk! Check It Out! 1 Be a Classroom Presenter Excite, teach and share your knowledge. Register 1 Be a Sponsor Help the Flagstaff Festival of Science continue its great work! Donate 1 FFoS Facebook PostsUnable to display Facebook posts.Show errorError: Error validating access token: Session has expired on Monday, 07-Oct-19 10:24:25 PDT. The current time is Wednesday, 23-Oct-19 12:39:06 PDT.Type: OAuthExceptionCode: 190Subcode: 463Please refer to our Error Message Reference.