The publication of Rachel Carson’s book Silent Spring (1962) is widely regarded as one of the key moments in the development of the global environment movement. In the wake of Silent Spring, science fiction writer Frank Herbert published the first of the Dune series in 1965. Herbert presented complex descriptions of alternate planetary ecologies, with influential characters known as ‘planetologists’ (a new film version is due out this year). In 1972, the image of the ‘Blue Marble’ was released, a photo of Earth taken by the Apollo 17 crew on their way to the moon, also widely considered to be critical in influencing public understandings of our finite planet. Each of these developments extended a long history of exploratory research, experimentation and imagination about the deep and complex connections of Earth systems. Sarah Dry’s Waters of the World investigates six critical figures in this history.