Retired Capt. Don Walsh, Ph.D., who commanded the U.S. Navy’s bathyscaphe Trieste, discusses the dive to the deepest place on Earth, the Challenger Deep located at the southern end of the Mariana ...

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 ...

TOKYO -- The world's deepest-diving submarine has disappeared in the choppy Pacific Ocean off Japan, a setback to deep-sea research on everything from earthquakes to rare bacteria. Kaiko, a bright ...

100415-N-7676W-101 WASHINGTON, D.C. (April 15, 2010) Rear Adm. David Titley, Oceanographer of the Navy, congratulates retired Capt. Don Walsh, the first commander of the U.S. Navy bathyscaph Trieste. ...

CNN — (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 ...

TOKYO (AP) — The world's deepest-diving submarine has disappeared in the choppy Pacific Ocean off Japan, a setback to deep-sea research on everything from earthquakes to rare bacteria. Kaiko, a bright ...

(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 ...

Situated in the enormous Pacific Ocean, the Challenger Deep is the lowest point on our planet. Found along the Mariana Trench, this natural phenomenon is an example of the astoundingly deep and ...