Challenger expedition
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The Challenger expedition of 1872–1876 was a scientific programme that made many discoveries to lay the foundation of oceanography. The expedition was named after the naval vessel that undertook the t
HMS Challenger refitted at Sheerness in 1872, The Illustrated London News
Track of HMS Challenger from December 1872 until May 1876. The colour contours represent ocean surface density.
One of the original boxes containing the photographic negatives brought back from the expedition
HMS Challenger in the Southern Ocean, drawn by crewman Sub-lieutenant Herbert Swire
Mariana Trench
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The Mariana Trench is the deepest oceanic trench on Earth, located in the western Pacific Ocean, about 200 kilometers east of the Mariana Islands. It is crescent-shaped and measures about 2,550 km in
Challenger expedition
…the Pacific was a long journey across the open ocean to the north, passing mostly west of the Caroline Islands and the Mariana Islands, discovering the Mariana Trench on 23 March 1875. Challenger reached port in Yokohama, Japan, in April 1875. Challenger departed Japan in mid-June 1875, heading east across the Pacific…
The bathyscaphe Trieste (designed by Auguste Piccard), the first crewed vehicle to reach the bottom of the Mariana Trench