Professional diver Andrew Ryzebol tells PEOPLE exclusively of his risky underwater explorations 200 feet beneath uncharted ice with nothing but a mask and fins Ontario Freedivers Remember as a kid ...

It might sound like 43.5 psi is too much for a person to handle, but it's actually ... You have a tank with pure oxygen (and no nitrogen) and you dive to a depth of 10 meters.

For nearly 20 years, the aquarium has offered guests the death-defying opportunity to take a cage dive into its 120,000-gallon tank. Participants are accompanied by a dive pro and must wear a ...