Pilot and author MJ Marggraff will talk about similarities between how we live on Earth and how astronauts live in space and whether preparations for life on Mars could help our way of life back here. She will also share details from her experience training for suborbital space flight. Sponsored by the Walnut Creek Library Foundation, this free program celebrates the city’s 2016 One City One Book, “The Martian” by Andy Weir. Reservations are recommended to guarantee your free seat and can be made online at www.wclibrary.org/one-city-one-book/.