Spotlight: Marie Tharp, Pioneer of Ocean Floor Mapping

The World Ocean Floor map, created by Marie Tharp and Bruce C. Heezen, took years of data collection and synthesis -- and Tharp's tenacious march forward despite the barriers women faced in science during her lifetime. Image: World Ocean Floor Panorama, Bruce C. Heezen and Marie Tharp, 1977. Copyright by Marie Tharp 1977/2003. Reproduced by …