We were amazed at this to-scale map ... Ocean near the Philippines. Near the top is a tiny black dot, a to-scale representation of a 6-foot-tall person. Below that is the maximum diving depth ...

Ocean depth is divided into zones: littoral, bathyal, abyssal and hadal. The deepest part of the ocean, the hadal zone, is anywhere deeper than six kilometres. What is the average depth of the ocean?

NGM MAPS. Source: “spatial and temporal changes in cumulative human impacts on the world’s ocean,” Ben S. Halpern and others, Nature Communications; UNEP-WCMC, World Database on Protected ...