Testing out new scuba diving gear leads to fatal mistakes for one experienced rescue diver.

Two scuba divers tried to take a selfie to impress their friends — but one of them never surfaced. Learn from the mistakes that led to their accident.

In this installment, Eric Douglas explains the relationship between heart disease risks and waistline, and explains what it's like to be in cardiac rehab.

Do you get cramps or feel fatigue after scuba diving? It's probably not decompression sickness, so try these electrolyte solutions for a more comfortable post-dive experience.

Can you dive again after open-heart surgery? Author Eric Douglas tells the true story of his heart disease recovery in his latest installment: Lessons Learned.

Beta blockers and diving. Does high blood pressure really affect someones ability to dive?

Diving in caves can be dangerous — even if you've had the right training. Find out why this husband and wife died in an underwater cave system.