The sea mammals may actually be able to sense the amount of oxygen in their blood—something we humans can't do.

Hammerhead sharks can hold ... breath. "That whole duration lasts an average of 17 minutes," Royer said. Footage from a previous study supports this idea. This video spotted a hammerhead shark ...

From learning how to breathe while swimming to building stamina in the pool, these swim coach-backed tips will get you swimming stronger in no time. If you’re anything like me, your average pool ...