The divers didn't make it back.

The divers were trapped in the cave.

The divers are running out of air.

The only creatures that have got conscious control of their breath are the diving animals and the diving birds.

This is what many divers would consider paradise.

So, I started researching into pearl divers.

The volcanic nature of the island has attracted scuba divers.

Scuba divers can't get there, submarines go right on past it.

The exception was the coastal city of Sharm el Sheikh, which the Israelis had renamed as Ofira during the period of their occupation.

This is an image of high school students, scuba divers that we worked with on our team.

And when I was researching pearl divers, I found the world of free diving.

In 2000, the torch was carried under the water by divers near the Great Barrier Reef.

Tadpoles are highly vulnerable to being eaten by fish, newts, predatory diving beetles, and birds, such as kingfishers.

And so I started that swim in a bathing suit like normal, and, no joke, this is it it came from the shark divers.

But the thing about this is that every once in a while we divers can run into trouble, so I'm going to do a little thought experiment here.

On 7 March, Russian forces scuttled a second ship, a diving support vessel, to further block the navy port at Donuzlav Lake.

And I talked to divers that had been diving there for many years, and they said that the marine life was better here today than it was in the 1960s.

Rosa Mexicano restaurant, where he transports us to the shores of Acapulco, up on the Upper West Side, with this wall of cliff divers who there you go, like that.

If you were to go down to a depth of about 130 feet, which is the recommended limit for most scuba divers, you get this pressure effect.

Ballard kept the wreck's exact location a secret to prevent other divers from taking artefacts from the ship, a practice he considered a form of grave robbing.

Environmental issues Since the use of spearguns and dynamite for fishing was banned through efforts of local conservationists in the 1960s, the wildlife is unafraid of snorkelers and divers.

This is a tracking experiment, and any of you scuba divers, if you want to get involved in one of the coolest projects ever, this is off the Great Barrier Reef.

The ship slowed to to allow divers to pump fuel from the forward compartments to the rear tanks two hoses were successfully connected and a few hundred tons of fuel were transferred.

But, the point is that scuba divers generally stay less than 100 feet deep, and very rarely go much below this, at least, not with any kind of sanity.

Enter the Bitonga Divers an NGO championed by Mozambique's first dive professional, the inspiring Carlos Macuacua, based in Tofo, a town in Inhambane province. Quoting their website

Now, if you do an economic analysis and project what would happen if the fish were not cut, if we brought just 20 divers one month per year, the revenue would be more than 20 times higher and that would be sustainable over time.

A film about four generations of fisherwomen striving to make a living in the coastal village of Adara, in the small island of Ataúro, Timor Leste is soon to be released but you can already have a glimpse on what is coming at the Facebook page Wawata topu (Women Divers)

And it's a company that's trying to bring the experience many people have boats, or enjoy being on boats, but a very small percentage of people actually have the capability or the interest in going under the water and actually seeing what's there, and enjoying what scuba divers do.

If you look at this diagram of a coral reef, we know a lot about that part up near the top, and the reason we know so much about it is scuba divers can very easily go down there and access it.

A helium oxygen breathing gas is often used by deep sea divers at depths of seawater over to keep the diver from experiencing oxygen toxemia, the lethal effect of high pressure oxygen, and nitrogen narcosis, the distracting narcotic effect of the nitrogen in air beyond this partial pressure threshold.