It seems JavaScript is either disabled or not supported by your browser. To view this site, enable JavaScript by changing your browser options and try again.
Jump to main content
Spooky darkness, bright colors, and big eyes! Discover what scientists are finding in the ocean depths known as the twilight zone.
Photo by Tim Wong
When diving in deep coral reefs, scientists breathe a mixture that includes helium.
An extensive and comprehensive dive into the Twilight Zone, or deep coral reefs, of Hawaii.