Reading Carl Sagan's notebook at the Library of Congress

Reading Carl Sagan's notebook at the Library of Congress
Reading Carl Sagan's notebook at the Library of Congress Planetary Society Digital Specialist Mark Hilverda reading Carl Sagan’s Titan Master Book I. The notebook contains handwritten notes and cross-sections of Saturn’s hazy moon Titan and is available online at the Library of Congress website. Brandon Schoelz / The Planetary Society

"We're changing the world. Are you in?"
- CEO Bill Nye

Sign up for email updates