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Murmurs of Earth (original title: Murmurs of Earth: The Voyager Interstellar Record) is a science book prepared by American astronomer, astrophysicist and science communicator Carl Sagan together with Ann Druyan and Frank Drake. The book explores the messages carried by the Voyager space probes and humanity’s efforts to express itself in the cosmos. Content and Themes The book addresses space exploration and humanity’s attempts at communication on a cosmic scale. The main themes are: The Voyager