The deepest known point in any of the world’s oceans is Challenger Deep, a section of the Mariana Trench that plunges to about 36,070 feet (10,994 meters). It’s an extraordinary place on Earth. While ...

The Mariana Trench is believed to be too extreme for large predators to survive. When cameras were lowered into its depths, researchers expected little more than darkness and silence. Instead, the ...