Seventy-one percent of the planet is covered by ocean. If we were to make an elevation average of the Earth’s surface, we’d be 3,000 meters (almost 10,000 feet) below the sea. This vast expanse is ...

Such a map is rare. The vastness and depth of the ocean make it notoriously difficult to study. But in 2008 a team of researchers used satellite images and modeling software to make a complete ...