I've been to the Mariana Trench. The choice is clear: Protect one of earth's last frontiers or destroy it before we even understand what we're losing.

In the open ocean, a manta ray's path can seem deliberate, until, without warning, it slips beneath the surface and vanishes into the blue. Hours or days later, it reappears far from where it began.

A deep-sea training and engineering dive off the coast of San Diego provided an opportunity for never-before-seen imagery of the U.S. Navy submarine USS F-1, lost at sea in an accident on December 17, ...

Around a month after Shubhanshu Shukla became the first Indian to reach the International Space Station, India sent an aquanaut 5,000 metres deep into the ocean in a first-of-its-kind expedition ...

With ear-like fins that flap gracefully through the water, the Dumbo octopus in this YouTube video looks like it waltzed straight out of an animation studio. But don’t let their cute facade fool you; ...

For deep reef divers, descending into the ocean’s mesophotic layer can feel like exploring the moon. Discovering never-before-seen marine species is part of the mission. The deep diving team heads ...

What started out as an underwater, late-night adventure for marine biology students became a dive they would never forget ...