The Flagstaff Festival of Science begins today and it’s all about astronauts. The theme is To the Moon and Beyond in honor of the 50th anniversary of the Apollo moon landings. It takes a lot of people to launch an astronaut into space, and one of those people is Flagstaff geologist Lauren Edgar of the U.S. Geological Survey. It’s her job to train future astronauts in geologic field work, using Northern Arizona’s volcanoes and lava fields as a kind of stand-in for the Moon and Mars. Mars even has its own supersized Grand Canyon called Valles Marineris. KNAU’s Melissa Sevigny spoke with Lauren Edgar about her work with the most recent class of astronaut candidates.