http://www.newsweek.com/bacteria-oil-bottom-mariana-trench-1394380

An international team of researchers has discovered a new group of oil-eating bacteria in the mysterious ecosystem of the Mariana Trench, according to a study published in the journal Microbiome.

Located in the Western Pacific, the deepest part of the trench lies a staggering 36,200 feet below sea-level. If you were to place Mount Everest at the bottom, the peak would still be around 7,000 feet from the surface.