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Enter the twilight zone: scientists dive into the oceans’ mysterious middle

The vast, wild depths between light and shadow face increasing threats from climate change and overfishing.
  1. Jeff Tollefson
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It is home to a majority of the marine fish biomass and helps to remove an estimated 4 billion tonnes of carbon dioxide from the atmosphere each year. Now, scientists are gearing up to dive into the twilight zone, the largely unexplored ocean layer 200 to 1,000 metres deep that some worry is threatened by a changing climate and increased pressure from fishing.

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doi: https://doi.org/10.1038/d41586-020-00520-8

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