New images from the North Sea show never-before-seen landforms that were carved by a single, colossal ice sheet 1 million ...

When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what ...

Here are 25 otherworldly images of the unique creatures, sunken wrecks, underwater art, and other surprising things that can be found in the world hidden beneath the waves.

Rising mountain peaks and sharp rock formations cover the ocean floor, with corals, sponges, fish, and tons of sea creatures ...

Scientists exploring the ocean off the New Zealand coast believe they have discovered 100 new marine species. A 21-strong team on the Ocean Census expedition have been mapping and investigating ...

Miles below, a deep-sea fish approached the camera’s bait then, changing its mind, swam backward to escape. The footage turned out to be a first-of-its-kind sighting — but it wasn’t the last.

ColobusYeti/iStock Editorial / Getty Images Plus Giant isopods like those ... just how little we know about the denizens of the deep sea. Increasing our understanding will be vital, they conclude ...