The ocean's twilight zone is deep, dark, and—according to new research—iron deficient. No sunlight reaches this region 200 to 1,000 meters below the sea surface, where levels of iron ...

It's a rule of thumb -- or fin -- for the ocean: The deeper you dive, the weirder things get. Now, a new exhibit lets visitors jump straight into the strangest layer of the ocean, bringing the ...

Many exist in the twilight zone, the part of the ocean from 500 to 1,000 metres deep ... Even in one organism bioluminescence can have multiple uses. In the deep sea, light is used to attract prey or ...