Welcome to the twilight zone. It’s a real place — but under the sea. The mesopelagic zone, also known as the “twilight zone,” is a mysterious region of the ocean between 200 and 1,000 meters in depth.

"Great step in raising awareness." Officials debate future plans for ocean 'twilight zone': 'We see great potential' first ...

One of Earth's largest habitats could see its rich diversity of life reduced by the end of the century due to the climate crisis. One of Earth's largest habitats could see its rich diversity of life ...

A large robot, loaded with sensors and cameras, designed to explore the ocean twilight zone. Marine Imaging Technologies, LLC © Woods Hole Oceanographic Institution ...

: [POST-BROADCAST CORRECTION Aug. 4, 2025: A previous version of this report incorrectly said that there are phytoplankton in the upper layer of the atmosphere. Phytoplankton live in the upper layer ...

Hundreds of feet below the ocean’s surface, somewhere between the dark ocean floor and the bright blue shallows, lies the twilight zone. It’s a world of the unknown, but in some tropical and ...

Just as TV producer Rod Serling took his audiences to "a fifth dimension beyond that which is known to man … an area which we call the twilight zone," the royal research ship James Cook has taken ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Only the faintest glimmers of sunlight can penetrate through to the ...

The mesopelagic zone is the chilly, dimly lit layer of ocean found 200-1,000 meters (660-3,300 feet) below the surface, which ...

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 ...