On December 10, 1997, environmentalist Julia “Butterfly” Hill, a member of Earth First! advocacy group, climbed to the top of a 200-foot-tall redwood tree in Northern California. Hill was protesting the destruction of nearby redwood forests by the Pacific Lumber Company. She slept on a 8 x 8 ft plywood platform in the 600-year-old tree named “Luna” for 738 days, withstanding El Niño storms and cold, wet winters. While her “tree-sitting” received criticism from Humboldt and lumberjacks, her nonviolent protest grabbed the attention of the press, and she was able to save the tree while simultaneously shedding light on the work of fellow environmental activists, and inspiring a generation of new young activists. Photo credit: Yann Gamblin/Paris Match via Getty Images