The ocean covers almost 70 percent of the Earth’s surface, and over 95 percent remains unexplored. With so much of the ocean ...

This was possible because each whale call made two sets of waves: one that traveled directly to the seismic station on the ocean floor, and another that bounced between the ocean floor and surface ...

Marie Tharp mapped the ocean floor, but her scientific work has gotten little attention, says Hali Felt in this excerpt from her book chronicling Tharp’s life, “Soundings.” Marie Tharp posed next to a ...