It allows the sovereignty of nations to be extended to near the base of the continental slope. The modern scientific definition of a continent has four criteria: Elevation (water depth ...

Geology’s Theory of Everything continues successfully to defend its title. ■ Curious about the world? To enjoy our ...

This discovery, together with data from a 1964 research vessel, transformed the field of geology. It confirmed sea-floor spreading as hypothesized by Hess, and thus "continental drift," originally ...