Aquanaut Fabien Cousteau’s 31-day mission underwater

We’ve done several Google+ Hangouts at the NewsHour, but until now, none were filmed underwater.

On Saturday, we dialed up Fabien Cousteau, whose Mission 31 team is spending more than a month 63 feet beneath the waves at Florida International University’s Aquarius Lab.

Cousteau, the grandson of the legendary underwater explorer Jacques Cousteau, told the NewsHour audience about the research they’re doing below the surface.

Cousteau also took us on a tour of the lab and explained a bit of the science that enables their bodies to stay “saturated” at three “atmospheres.” Watch the video below to learn what those words mean.