Effects of Aspirin on Diving

If you take aspirin everyday, what will be the impact on a diver’s risk of decompression sickness? Two DAN doctors answered a common question and provided their best advice.

A spilled bottle of aspirin lies on top of some medical charts

Caissons, Compressed-Air Work and Deep Tunneling

Do you know how underground tunnels are made? The working spaces, or caissons, are pressurized with compress air. But in the 19th century, many laborers had an unexplained illness after returning to atmospheric pressure.

An old photo of workers building tunnels and bridges


Conch snails are remarkable creatures with a set of eyes, a nose (sort of), a mouth and one foot. And because they’re slow, conches are commonly picked up and are a considered a delicacy in some regions.

A queen conch peers out of its shell.

Distracted While Diving

It can be easy to lose sight of depth, time and gas supply when you’re in search of the perfect image. Stay alert — don’t compromise your safety for the sake of a photograph.

A diver swims overhead holding a camera

Differentiating Coral Bleaching and Coral Mortality

Corals bleach, or turn white, when their symbiotic algae are expelled from the corals’ tissues due to stressors such as excessively warm water. Bleached corals can and do recover when favorable conditions resume.

A stark white coral is nestled in a bed of other corals

Night Drifters

Recent studies have shown larval fishes to be strong swimmers with sophisticated instincts for remaining in local waters. But exactly where they go between spawning and settlement remains a mystery.

Larval moray eel

Head Injuries and Diving

If you have a history of head injuries, it may impact your ability to dive. Our experts answer questions pertaining to head injuries.

A woman holds her head. Her head is injured.

Invisible Crystals

Polymorphic crystallization inside hoses has recently emerged as a hazard divers should be aware of. Be sure to replace old hoses, limit hoses’ exposure to high temperatures, and follow manufacturers’ maintenance recommendations.

A new black hose is being held

Asking the Right Questions

Ingrid Eftedal, Ph.D., studies the genetic and molecular mechanisms involved in the body’s responses to diving. Eftedal’s diverse background includes work in molecular biology, forensic genetics, civil engineering, biophysics and medical technology.

Ingrid Eftedal, Ph.D., stands beside a small hyperbaric chamber used for animal studies.