The world's oceans are big and dark and deep. They cover approximately 70% of the planet’s surface and contain a huge portion of Earth’s biodiversity. If you want to find some of the weirdest ...

The Mariana Trench has long captured the public's imagination. Here are some facts about one of the Earth's great wonders. Q. What is the Mariana Trench? The trench is the deepest place on Earth, ...

Researchers have detected man-made mercury pollution at the bottom of the Mariana Trench—the deepest oceanic trench on the planet. A team of scientists identified methylmercury—a toxic form of mercury ...