Ariel Waldman is the founder of Spacehack.org, a directory of ways for anyone to participate in space exploration, and the global director of Science Hack Day, a grassroots endeavor to make things with science that is now in 25 countries. She is the author of "What’s It Like in Space?: Stories from Astronauts Who’ve Been There" and the co-author of a congressionally-requested National Academy of Sciences report on the future of human spaceflight. She also sits on the council for NASA Innovative Advanced Concepts, a program that nurtures radical ideas that could transform future space missions. In 2013, Ariel received an honor from the White House for being a Champion of Change in citizen science.