The Mariana Trench is located in the western Pacific Ocean and is the deepest known part of Earth's oceans. It is a crescent-shaped scar in the Earth's crust that measures about 2,550 km long. The deepest point, known as Challenger Deep, reaches a depth of approximately 10,935 meters (nearly 7 miles) below sea level. If Mount Everest were dropped into the trench, its peak would still be over two kilometers underwater. The pressure at the bottom of the trench is over 1,000 times the standard atmospheric pressure at sea level. Despite this crushing pressure and the total absence of light, unique life forms such as xenophyophores, amphipods, and small sea cucumbers survive there, adapted to the extreme environment of the hadal zone.