Re:Underwater breather has raised $800k+ despite being scien...
by jlg23 on Tuesday March 29, 2016 @11:43AM
(#11382290)
The initial ones could come from the lungs of the person.
When you do a free dive you pump your lungs full of air and gradually release that air over the course of the dive. A trained swimmer can easily swim without breathing for 50 meters, producing air bubbles all the time. (EDIT: active swimming, aiming for distance. I had to do this when I got my lifeguard certification - IIRC 25m sufficed to qualify, but everyone did 50m).
That video is unfortunately way too short to prove anything.
When you do a free dive you pump your lungs full of air and gradually release that air over the course of the dive. A trained swimmer can easily swim without breathing for 50 meters, producing air bubbles all the time. (EDIT: active swimming, aiming for distance. I had to do this when I got my lifeguard certification - IIRC 25m sufficed to qualify, but everyone did 50m).
That video is unfortunately way too short to prove anything.