When threatened by a predator, these lizards dive beneath the surface and create ... We also know that they’re pulling oxygen from this bubble of air,” said Swierk. “We didn’t know whether ...

With the increased pressure, the O2 can be added to a SCUBA tank that contains high pressure air to create what’s known as NITROX. The idea is to increase the percentage of Oxygen in order to ...

No amount of eagerness to dive should ever make you skip any pre-dive safety checks. Here's what happened to one diver who learned that lesson the hard way.

I felt a tug on my shoulder and turned to see my dive buddy engulfed in a mass of bubbles. He’d had a failure with his scuba regulator, and his air was draining out of his tank. Divers are ...