In 1980, astrophysicist Carl Sagan’s Cosmos: a Personal Journey, opened with this line: “The Cosmos is all that is, or ever was, or ever will be.” Sagan was the world’s most famous scientist during the golden age of solar system exploration. In Cosmos, he invited the world to delve into the history of human scientific discovery. He made the story of 15 billion years of cosmic evolution accessible, exciting, and even personal. To this day Cosmos is the most viewed documentary PBS has ever produced. It has been seen by more than 60 million people worldwide, and inspired a generation of young people to become scientists.