Victor Vescovo descended nearly 11km (seven miles) to the deepest place in the ocean - the Pacific Ocean's Mariana Trench ... it was a great honour to be invited on this expedition to a place ...

Narrator: The Mariana Trench is the deepest point on Earth ... Because once you pass 4,500 meters or so, the pressure is so great and the temperature is so low that calcium carbonate dissolves.

Not anymore. Kelly Walsh, the son of the great ocean explorer Don Walsh, has just descended to the bottom of the Mariana Trench, almost 11km down in the Pacific. He made the dive 60 years after ...

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The Mariana Trench runs more than 1,500 miles long and spans more than 40 miles across. At its deepest point, known as Challenger Deep, the trench descends approximately 11,000 meters (6.8 miles ...

The first explorers visited the trench in 1960 on a brief expedition, after which there had been no missions until Hollywood director James Cameron made the first solo trip to the bottom in 2012.