The Mariana Trench is the deepest and probably the most enigmatic place on Earth. Whatever that means. Bizarre creatures, ...

Notable sightings along the way included the discovery of an extensive crinoid meadow at a depth of 9,100 meters (29,855 feet ...

The historian Procopius described how a creature called Porphyrios terrified sixth-century sailors for 50 years. But what was ...

Surface dwellers don’t really appreciate light, having far too much of it. When you live more than a mile beneath the surface ...