What's at the bottom of the Mariana Trench, and how do we know? How deep does the ocean go? We'll answer these questions and more in this deep dive into the world's oceans. Come on in: The water's ...

The African continent is experiencing a geological change that may redefine the planet’s geography. An ocean may in time develop from a rift in the Afar Triangle, in the Horn of Africa, which will be ...