Koch has been living and working underwater in his 322-square-foot living space, complete with a portable toilet, TV, computer, stationary bike, multiple fans, satellite internet and solar power.

A 59-year-old German man is more than 60 days into his attempt to break the Guinness World Record for the longest time spent living in an underwater fixed habitat. Rüdiger Koch, an aerospace ...

Altogether, there are 830 square feet of living space (around 77 square meters). Rudy’s underwater room is a ... that can actually walk about the house like bipedal robots,” he said.