“What does it take to really save nature?” writer and environmentalist Mary Ellen Hannibal asks in Citizen Scientist: Searching for Heroes and Hope in an Age of Extinction. In this wide-ranging adventure—part memoir, part investigation— Mary Ellen Hannibal makes a deeply personal case for the necessity of citizen scientists, sharing stories from boaters recording whale sightings and tracking migration paths to the volunteers whose redwood restoration projects may provide our best hope in