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

Marine mammals can dive for remarkably long periods because their bodies have evolved to adapt to the underwater environment. Elephant seals, in particular, can hold their breath for about two hours.

A new study suggests gray seals (Halichoerus grypus) can sense the level of oxygen in their blood and that the animals change their diving behavior in response. Seals can do many things humans can ...

Chris McKnight has spent much of his career studying the physiology of seals. But in 2019, the ecologist decided to test a new instrument for gathering data underwater on another kind of swimming ...

That's exactly what the researchers found. In contrast, the seals didn't really change their diving behavior in response to CO2, even when it was 200 times ambient levels. That was "a real ...