The Hranicka Abyss is at least 1,325 feet deep, and likely goes down further. — -- A team of explorers believe they have discovered the deepest known underwater cavern the world in eastern Czech ...

From the summit of Mount Everest to the depths of the Mariana Trench, our planet’s extremes tell an astonishing story of geology and scale. This video explores Earth’s highest and lowest points — ...

The Pacific Ocean is home to some of the deepest points on the planet. In fact, four of the top six deepest spots in the world can be found in the Pacific. The Pacific's basin is uniquely low, which ...

As the race to explore the world's oceans intensifies, scientists are turning to powerful new battery technologies to overcome one of deep-sea exploration's greatest challenges: how to keep underwater ...