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 ...

Dylan Taylor holding a mission patch for STS-51L, the last mission of Challenger at the bottom of the Challenger Deep. Source: Dylan Taylor Last summer I had a chance to visit one of the most remote ...

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 ...

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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. "I am the first person to go pole to pole, space and deep and the second person — first male — to ...