Helen M. Rozwadowski is an associate professor of history and founder of the Maritime Studies Program at the University of Connecticut, Avery Point. She received her PhD from the University of Pennsylvania. Her book, Fathoming the Ocean: The Discovery and Exploration of the Deep Sea (2005), won the History of Science Society’s Davis Prize for best book directed to a wide public audience. She has also written a history of twentieth-century marine science, The Sea Knows No Boundaries (2002), which explores the history of twentieth-century marine sciences supporting international fisheries management. She has coedited three volumes on the history of oceanography: The Machine in Neptune’s Garden: Perspectives on Technology and the Marine Environment (2004); Extremes: Oceanography’s Adventures at the Poles(2007); and, recently, Soundings and Crossings: Doing Science at Sea 1800–1970 (2017). She was awarded the William E. & Mary B. Ritter Fellowship of the Scripps Institution of Oceanography and has received grants and fellowships from the National Endowment for the Humanities, National Science Foundation, and Smithsonian Institution. In fall 2018 her new book, Vast Expanses: A History of the Oceans, will be published by Reaktion Books, Ltd.