The sun shimmers across the glassy surface of Blue Hole, a heart-shaped underwater sinkhole, as two divers prepare to descend into its treacherous, turquoise abyss. Entering the twilight zone “feels ...

: [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 ...

Almost one decade of recorded data retrieved from deep coral reef dives reveals some of the first evidence of that climate change is warming the ocean’s ‘twilight zone’.

Elephant seals are being used as nature's artificial intelligence to monitor the health of the oceans -- especially the little-known "twilight zone," an ecosystem abundant with fish that could soon be ...

This zone contains a vast amount of marine life, potentially over 90% of all ocean life, and supports important commercial and recreational fisheries. Creatures in the twilight zone help mitigate ...

(CNN) — Only a scattering of light penetrates the deep water, more than 300 feet beneath the ocean surface off the coast of Guam. It’s like twilight to the human eye, even in the middle of the day.

A groundbreaking digital exhibition brings deep ocean life to Washington, D.C. Dive beneath the waves and explore the mysteries of the ocean’s twilight zone right in Washington, DC! Join host Felicia ...