NASA's Europa Clipper took off earlier this week, headed for Jupiter's fourth-largest moon. Etched on the outside of the spacecraft is a poem by U.S. Poet Laureate Ada Limón called "In Praise of Mystery." Now, that poem, which celebrates human curiosity, has been adapted into a picture book by the same name, illustrated by Peter Sís. In today's episode, Limón speaks with NPR's Mary Louise Kelley about her collaboration with Sís and how to write a poem with staying power across time and space. Finally, Limón reads her poem out loud.To listen to Book of the Day sponsor-free and support NPR's book coverage, sign up for Book of the Day+ at plus.npr.org/bookofthedayLearn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy