8 Surprising Facts About the Deepest Part of the Ocean

(via mental_floss)  The deepest part of our oceans, the region from below 20,000 feet to the very bottom of the deepest sea trench, is known as the hadal zone. It’s named after Hades, the underworld of Greek mythology (and its god). Scientists still know very little about this mysterious and difficult to study region, but what we have learned is astounding.