Why don't diving seals drown? Scientists finally have an answer

When Breath Fails: The Deep Difference Between Seals and SEALS

What do elite Navy SEALS, world-class free-divers, and marine mammals have in common? They all push the limits of breath-hold endurance—yet only one group evolved with the right warning system to avoid drowning. As it turns out, the difference between life and death underwater may hinge on whether your body listens to oxygen… or its proxy, carbon dioxide.

Why don't diving seals drown? Scientists finally have an answer

New research suggests seals sense internal oxygen levels to know when to come up for air. Digital version of story that already aired. Skedded for pub Weds. 3/26 at 6 a.m. Reporter: Lambert. Editor: Khan.(Image credit: University of St. Andrews Sea Mammal Research Unit)

In Saaremaa, a seal was swimming under the forest, a kilometer from the sea. Rescuers helped the lost sea creature back into the water.

How Can Seals Hold Their Breath for an Hour or More?

Humans can't sense their own oxygen levels, but seals can, and it makes diving longer and safer.