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Is there life at the bottom of the Mariana Trench?

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It was called the Mariana Trench, and at the very, very bottom was the lowest point on Earth's surface, the Challenger Deep. Its floor was seven terrifying miles down. What was down there? It was fun to imagine. I didn't know, and it didn't seem likely anyone would anytime soon. read more

The New Britain Trench -- which Cameron visited as a test-run for Mariana -- which at 8,200 meters deep is only 2,700 meters shallower than Challenger Deep. But life there was very different. The trench bottom was home to an array of sea cucumbers,sea anemones, jellyfish, comb jellyfish, and giant amphipods. read more

Normally, these organisms produce calcium carbonate shells, but at the bottom of the Mariana Trench, where the pressure is around 1,000 times greater than at the surface, calcium carbonate dissolves. This means that the organisms instead have to use proteins, organic polymers, and sand with which to craft a shell. read more

The Mariana Trench or Marianas Trench is the deepest part of the world's oceans. It is located in the western Pacific Ocean, an average of 200 kilometres (124 mi) to the east of the Mariana Islands, in the Western Pacific east of Philippines. read more

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