Unlike humans, marine mammals have evolved remarkable adaptations that allow them to hold their breath for extended periods, ...

So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that ...

What do elite Navy SEALS, world-class free-divers, and marine mammals have in common? They all push the limits of breath-hold ...

That clears their systems of carbon dioxide, a gas that builds up when we hold our breath and that triggers the urge to ...