When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...

Non-native and rare species of sea slugs described as looking like aliens have been found by a group studying rock pools. The depilatory sea hare (Aplysia depilans), usually found in the eastern ...

The ocean is still one of the biggest mysteries on Earth, and the deeper you go, the stranger it gets. Far below the surface, where sunlight can’t reach, lives a world full of creatures that look more ...