समुन्द्रको अत्यन्तै गहिरो भाग हेडल जोनको रहस्य ||What is Hadal zone || Bishwo Ghatana

Our Next youtube channel : All History:    • The richest Man on Earth - Mansa Musa || स...   Follow on Facebook:   / bishwoghatna   Follow on twitter:   / bishwoghatana   What Is the Hadal Zone? In Greek mythology, the god Hades rules over the dark underworld, where the dead spend eternity. This world is hostile and remote, guarded by the Three-Headed-Hound of Hades, Cerberus. The river Styx surrounds Hades. Entering Hades is an irreversible move. In the myth of Orpheus and Eurydice, the living Orpheus enters Hades in an attempt to save his lover, Eurydice. He makes it out with his life, thanks to his beautiful music, but is unable to save Eurydice. The myth of Hades has many parallels with the deepest reaches of our oceans. They are both extremely remote and dark. Only three people in history have seen them in person. Marine biologists hope to save these depths from destruction before it is too late. Much like Orpheus, they are seeking to save something precious that has been beyond the reach of humanity. Modern technology is just now beginning to enable us to truly understand and try to protect these rare Hadal habitats. With dedicated conservation, humanity may be able to prevent this story from ending like that of Orpheus and Eurydice. The Hadal Zone Is the Deepest Reaches of the Ocean This imagery of a remote dark world deep beneath the surface makes Hades a perfect analogy for the deepest reaches of the ocean. The open (pelagic) ocean is divided up into five zones, based upon depth. In each zone, less sunlight from the surface filters through. In the third zone, the bathyal zone, no light penetrates except for rare exceptions. It is also called the midnight zone, or the dark zone. This stretches from one to four kilometers (3,300-13,000 ft) below the surface of the ocean. The hadal zone (separated from the bathyal by the even darker abyssal zone) starts at the ocean floor, around six kilometers below sea level. It consists only of trenches formed by the movements of the earth’s tectonic plates. At the deepest (in the Mariana trench) these stretch to 11km below sea level. This final 5 km of the depths of the ocean represents 45% of the ocean’s depth. Though these areas small, isolated regions, the life in them is unique from the rest of the ocean. A decapod Predators also venture into the depths. Scientists have found Decapods, another group of crustaceans, as deep as 7 km (23,000 feet.) This group includes crayfish, shrimp and crabs. At these depths, a rare species, Benthescymus create dominates these communities. They hunt the Amphipods that live here. Even in these depths, there are select species of fish. Researchers have seen the hadal snailfish Pseudoliparis ambles gomphosis as deep as 8 km (27,000 feet) below the surface. These observations were made in the Japan Trench by the Hakuho-Maru submersible. Below this, essential proteins for fish cannot function, so no fish can survive. Our understanding of the ecology of the hadal zone is still in its infancy. Scientists have made very few observations, and it is likely that they will find new species. Exploration of the Hadal Zone The deepest points of the ocean are hostile not only to live but also to technology. These extreme depths are extremely difficult to study. Fewer people have seen these depths than have been to the surface of the moon! Humans have reached the deepest known point in the ocean, the Challenger Deep, only twice. In 1960 Jacques Piccard and Don Walsh made the first trip. Canadian director James Cameron completed the second trip in 2012. New research using remote submersibles is now possible using advanced technology. The Woods Hole Oceanographic Institute developed the Nereus remotely operated vehicle. This submersible is enabling the first broad survey of life in these hadal trenches. Islands Below the Sea The ecology of hadal trenches is unique for many reasons. It’s the remoteness and extreme conditions are inhospitable to all but a few rare and specialized species, seen nowhere else on earth. The borders of these trenches create something like an island. Almost no species can move between these trenches. Music Credit : Martian Cowboy Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/b... http://incompetech.com/ http://audionautix.com/ http://audionautix.com/