"Until Marie Tharp's ground-breaking work in the 1950s, the floor of the ocean was a mystery--then, as now, we knew less about the ocean than we did about outer space. In a time when women in the scientific community were routinely dismissed, Marie's work changed our understanding of the earth's geologic evolution. While her partner, Bruce Heezen, went on expeditions to collect soundings (records of sonar pings measuring the ocean's depth across its entire expanse), Marie turned this data into beautiful and controversial maps that laid the groundwork for proving the theory of continental drift. Marie's maps for the first time showed that the continents were moving, had always been moving and what had happened over eons under the sea was as "visible" now as looking at the same phenomenon on land. Her maps have been called some of "the most remarkable achievements in modern cartography" and yet no one knows her name. Brilliant young writer Hali Felt captures the romance of scientific discovery, and brings to vivid life this pioneering scientist who changed the way we view the earth"-- Provided by publisher.