Mariana Trench
• The Mariana Trench is located in the Pacific Ocean, just east of the 14 Mariana Islands, near Japan.  It is the deepest part of the earth’s oceans, and the deepest location of the earth itself.
• The deepest part of the Mariana Trench is the Challenger Deep, so named after the exploratory vessel HMS Challenger II; a fishing boat converted into a sea lab by Swiss scientist Jacques Piccard.
• The Mariana Trench is 6033.5 fathoms deep. (11,033 meters (11 km)
• To illustrate the depth of the Mariana Trench: if Mount Everest, which is the tallest point on earth at 8,850 meters (8.8 km), was put into the Mariana Trench, there would still be 2,183 meters (2.18 km) of water left above it.
• The weight of water over head in the Mariana Trench is over 8 tons per square inch (the weight of 48 Boeing 747 jets)
• Temperature is just above freezing
• Japanese scientists visiting the Mariana Trench in Kaiko in 1995 made detailed observations of shrimps, a scale worm and a sea cucumber at a depth of 10,911 m (35,800 ft). In 1998, Kaiko captured an amphipod (Hirondellea gigas, a Crustacean, subclass Malacostraca) at the Challenger Deep. A kind of shrimp.
• https://www.youtube.com/watch?v=UwVNkfCov1k

Hydrothermal Vent: https://en.m.wikipedia.org/wiki/Hydrothermal_vent

Ocean Vent: https://www.nationalgeographic.org/encyclopedia/ocean-vent/