The Flagstaff Festival of Science is a celebration of all the research and science that takes place in and around Flagstaff and Northern Arizona. Held from Sept. 19 to 28, festival attendees can enjoy a keynote from food sovereignty and sustainability advocate Mariah Gladstone. Another highlight is the free family science fair, Science in the Park, on Sept. 20. This event claims to be the longest, continuously running free science festival in the entire world. Visit scifest.org for more information.

