From playful and delicate marine life to dramatic encounters with powerful predators, these winning photos capture remarkable ...

This dive captured moments no diver wants to experience. Conditions changed fast and visibility dropped. Staying calm became critical. The footage shows how quickly fear can set in.

Imagine that you’re swimming out into your local lake. You’re a capable swimmer, you know this body of water like the back of your hand, and you feel confident while athletically stroking through ...