Deep below the Pacific Ocean lies the Mariana Trench, which is home to the Earth's deepest known point of the seabed, plunging to 10,935 metres below sea level.

An expert diver's record-breaking feat was supplemented, not by the discovery of a magical marine creature, but by plastic ...

The Mariana Trench is the deepest place on Earth, and we're still in the dark about much of the life that calls it home. Here ...