She's now a deep-sea diver and allegedly beat the Guinness World Record for dog scuba diving. "She started jumping in the sea by herself, and then I was testing her to get it into deeper water ...

To understand what exactly would happen to a diver in this bleak situation, the TV show hosts Jessi Combs, Kari Byron, Tory Belleci, and Grant Imahara conducted a science experiment for episode 19 ...

This experience alerted the navy to the problem of breathing normal air during a deep sea dive, and it started experimenting with a helium-oxygen mix. A US naval diver preparing for a dive in 1955.