A diver ignores a DCS symptoms, including a rash—an increasingly common sign of being bent.

Early-onset Alzheimer's complicates — but can't stop — diving for this determined diver and her loving husband.

The PADI Divemaster course is a starting point for many scuba diving jobs. It covers the physics and physiology of diving to in-water safety, diver supervision and the business of diving.

Learn where nudibranchs live and aim for a super macro shot that highlights the sea slug’s unique features.

Tips to prepare the kids and teens in your life to become divers, and what should you look for in the dive center or trip operator you choose for their journey.

No, whale sharks' eyeballs are not covered in miniature teeth. Here's what the discovery of dermal denticles in a whale sharks eyes actually means.

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Experienced cave diver details what it's like to discover new cave lengths and set the record for the longest dive into an underwater cave without resurfacing.

The IUCN Red List is a collection of the best available scientific data analyzed and summarized by an international team of experts—such an assessment is not an opinion and not a guess. But such an assessment does not carry the force of law, and IUCN Red List Endangered status doesn’t mean the same thing as being considered endangered under the U.S. Endangered Species Act.