CSI: Carl Sagan Collection
Early efforts to inform the public about science, pseudoscience, and the difference between them began in the late 1960s, and from them Sagan created one of the key principles of the skeptical movement: extraordinary claims require extraordinary evidence. From his later work came the other pillar of skeptical inquiry: The Baloney Detection Kit. With these principles, his TV appearances, and his popular and prolific science writing, it’s no exaggeration to say that Sagan inspired an entire generation of scientists and skeptics, the very people who now carry the movement in his absence.