Scientists are exploring the deep ocean to understand how oxygen can be produced there without sunlight.
Articles on Hadal zone
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Deep ocean trenches are home to extraordinary biodiversity waiting to be discovered.
The Mariana snailfish lives nearly 27,000 feet underwater, but has features that help it adapt to intense water pressure and cold. Physiological limits may prevent fish from surviving in deeper water.
From time-shifting earthquakes to bizarre creatures, the crushing depths of the hadal zone are another world.
