Just as Earth’s land surface has enormous peaks and valleys, the oceanic world has similarly varied topography. Perhaps the most intriguing of these features is the Mariana Trench — a chasm in the ...

In the western Pacific, the Mariana Trench isn’t the most popular travel spot. It’s frigid and bone-crushingly deep, not ...

Retired Navy Capt. Don Walsh, an explorer who in 1960 was part of a two-man crew that made the first voyage to the deepest part of the ocean — to the “snuff-colored ooze” at the bottom of the ...

Kathy Sullivan, an American geologist, has made history again. This past week, she became the first woman to reach Challenger Deep - that's the deepest point on the surface of the Earth. It's in the ...

Eleven years ago, Academy Award-winning filmmaker James Cameron surprised the world by taking a submersible he had secretly built, Deepsea Challenger, 35,787 feet down to Challenger Deep, the lowest ...

This astronaut just successfully reached the lowest point on Earth. Kathy Sullivan soared to new heights when she became the first American woman to walk in space in 1984. On Monday, she broke a new ...