Jacques Cousteau and Émile Gagnan Invented the Aqualung in 1943

Ahmed Gabr reached about 332 meters in the Red Sea in 2014.

Rising too fast lets nitrogen bubbles form in the body, a condition known as the bends.

The Professional Association of Diving Instructors became the world's largest diving training organization.

The acronym describes equipment that lets a diver carry their own air supply.