The Hadal Zone is the
The Hadal Zone is the deepest part of the ocean and home to the world’s deepest trenches, which are the least explored. These extreme marine ecosystems have low temperatures, almost no sunlight, are nutrient-deficient, and have pressures exceeding 16,000 pounds per square inch, equal to balancing 50 jumbo jets on a human thumb! While 12 people have walked on the moon, just 3 have ever been to this zone.
Only a handful of submersibles have been designed to reach these tremendous depths, and just 3 have reached the Challenger Deep, around 10,935 m, in the Mariana Trench, the deepest point on earth.
These submersibles have been built with special steel and titanium to withstand the oceanic pressure.
Mentioned below are 5 such submersibles.
1. Trieste
This was the first submersible to reach the deepest parts of the ocean in 1960. However, before focusing on the great feat, let us know a bit more about its design.
Trieste was the brainchild of Swiss Scientist Auguste Piccard, who designed it like one of his earlier bathyscapes, called FNRS-2.
It was constructed in Italy and launched in 1953,
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