Recreation areas onboard the sentinels can also function as an underwater laboratory. For now, according to The Guardian, Deep is preparing its participants to spend 28 days underwater.

If you owe more on your home than it’s worth, your mortgage is considered “underwater.” Hundreds of thousands of U.S. homeowners find themselves in this situation every year. Meanwhile ...

Dituri, 55, a biomedical engineer who teaches at the University of South Florida and calls himself “Dr. Deep Sea,” spent just over three months at the bottom of the Emerald Lagoon in Jules ...