Don Walsh and Jacques Piccard making their way to the bottom of the Mariana Trench in ... so most of the trench is in permanent darkness, while water at the bottom is only a degree or two above ...

A series of undersea mud volcanoes and hydrothermal vents in the Mariana Trench also support unusual life-forms, according to NOAA. Despite the highly acidic and infernally hot water produced by ...

creating the trench. Furthermore, this movement formed the Mariana Islands when water, trapped in the plates, exploded upward, forming underwater volcanoes. The islands themselves are what remain ...