Former US Navy diver Joe Dituri is attempting to live in an underwater habitat for a period of over 3 months.
If the idea of spending more than a few minutes underwater is unappealing, imagine what it would be like to spend 100 entire days cooped up in a tiny underwater habitat all on your own.
This is now the day-to-day reality of University of South Florida associate professor and former Navy diver Joe Dituri who is already one month into his record-breaking underwater stint.
His home for the duration of the experiment is a 55-square-meter subsurface habitat which, despite its small size, features all the amenities a person needs to survive.
Unlike a submarine, however, the habitat is not pressurized, meaning that Dituri will need to endure significantly more pressure than would typically be experienced by a person on the surface.
The aim of the experiment is to learn about the effects of long-term exposure to hyperbaric pressure on the body - something about which scientists know relatively little about.
If he succeeds, he will also earn himself a place in the record books.