The Mariana Trench, a crescent-shaped scar in the floor of the western Pacific Ocean, holds the deepest known point on Earth.

The Mariana Trench is the deepest part of the ocean, but another part of the world has a different trench that's home to its ...

Chinese scientists have revealed a hidden microbial oasis in the depths of the Earth's oceanic trenches, pushing the ...

When most of us look out at the ocean, we see a mostly flat blue surface stretching to the horizon. It's easy to imagine the sea beneath as calm and largely static—a massive, still abyss far removed ...

Here are some of the vessels humans have used to explore the ocean, starting long ago and going up to the present day.

I spent years preparing to dive into the deepest place on earth. Only a handful of people have traveled into the depths of the Mariana Trench, nearly 7 miles below the ocean surface. As a geologist ...

When we dream of landscapes, we might imagine rolling valleys or rugged mountains. But there is a whole landscape hidden from human view: the secret world of the seafloor. Half of Earth’s oceans are ...