Could lumpy metallic rocks in the deepest, darkest reaches of the ocean be making oxygen in the absence of sunlight?

It appears to be an alien planet. What is the ocean's deepest point? What lives in the Mariana Trench—and what has been discovered recently?

She has lost her memory, and all she remembers is that she has to is that she must go to the abyss. Enter the underground gate, and then through the Abyss to reach the Abyss. Thus began her ...

A recent deep-sea expedition into the Tonga Trench in ... The Pacific Sleeper Shark is a silent predator designed for the cold, dark depths of the ocean. These sharks can move quietly through ...