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 ...

“Challenger Deep” (in the Mariana Trench near Guam), is the deepest location in our world’s oceans. At a depth of roughly 35,800 ft (6.78 miles), it remained one of the great mysteries of oceanography ...

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 ...

The sunlight began to fade a few hundred feet down. Shades of gray turned to black. The steel structure groaned as the water pressure increased, and the Trieste sank toward the fabled gorge in the ...

(CNN) — 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 ...

In summer 1958, 27-year-old Navy Staff Lt. Don Walsh was assigned to the submarine tender Nereus, part of Submarine Flotilla 1 at the sub base on Point Loma. It was a safe, steady desk job, but less ...