You gasp at the daring, wonder at the possibility, just as you do when looking at a 500-year-old drawing imagining human flight or underwater breathing.

The official verdict is "sunk by a mine", however, some experts speculate that trouble with the schnorkel (the underwater breathing and engine operating device), may have been the cause.

He also possesses gills, enabling underwater breathing; and, he can enter a state of suspended animation when bereft of oxygen for long periods.

With new 1937 and 1942 patents (GC37 and GC42) his son Georges adapted this invention to underwater breathing by means of a single hose connected to a full-face mask.

That's why I was somewhat surprised when, after only 40 minutes, Nutty's voice broke the rhythmic gurgle of our underwater breathing.

The possibilities for exploration of the submarine environment are further extended by the use of flippers and snorkels, and scuba equipment allows underwater breathing and hence a longer time can be spent beneath the surface.

His costume included Kevlar body armor, visual and auditory amplifiers, radio gear, mini-gills allowing underwater breathing, and servo-motors which increased his strength at least twentyfold.

Back home, sleek amphibian adaptions for underwater breathing and feeding are common.

Both structures might actually have been for breathing air and the true gills (for underwater breathing) of Eurypterus have yet to be discovered.

The brief second Aquaman demonstrated many physical abilities in common with the original Aquaman, including underwater breathing, submarine speed, and superhuman strength.