Three women midway through a PADI Advanced Mermaid Training saved the life of a diver in distress.

Travelers can choose from a plethora of wreck dives at this world-class Caribbean island diving destination.

Karen van den Oever descended more than 800 feet down into South Africa’s Boesmansgat cave in October. Her record has yet to be certified by Guinness World Records.

Rules put forth by the state’s Department of Land and Natural Resources aim to address overcrowding and safety concerns that it says are due to the current lack of regulations.

Micro-nekton caught in benthic geography are supporting a food chain in a never-before-seen environs more than 1,600 feet deep.

Barge 129, the last missing Great Lakes whaleboat, was identified by a team of researchers, ending a more than century search for the wreckage.

Dan Metcalfe is waiting for Guinness World Records to certify his swim—more than 17,000 feet underwater—as the longest within his disability category, along with two other record attempts.

Hundreds of ballast stones were removed from the side of the shipwreck, exposing the wooden frames and planking of the *North America*. This will accelerate the ship’s degradation.

Melting sea ice is accelerating its uptake of carbon dioxide, driving a chemical change in the ocean that is a severe threat to life in the ocean.