How deep does the ocean go? We'll answer these questions and ... Challenger Deep, the lowest point in the deepest canyon on Earth, lies 35,876 feet below sea level at the southwestern extreme ...
It is now called the Mid-Ocean Ridge. In 1953, American physicists Maurice Ewing (1906-1974) and Bruce Heezen (1924-1977) discovered that through this underwater mountain range ran a deep canyon.
There are subsea canyons far bigger than the Grand Canyon.The Grand Canyon is 6,093 feet (1,857 meters) deep, but the ...
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