It looked like a shadow at first — but after several minutes, a rare species of deep-sea shark had swum by an underwater ...

Thousands of feet below the surface of the ocean, off the coast of Central California, a mysterious clicking sound punctuated the silence of the deep sea. The peculiar noise was picked up by a ...

The deep sea, a realm of perpetual darkness, crushing pressure, and cold temperatures, is home to some of the most unusual and mysterious creatures on Earth. Recent discoveries have unveiled a host of ...