There are probably easier ways to set a world record, but Rudiger Koch has found his method 11 meters (36 feet) under the sea.

He's been living in a submerged capsule off the coast of Panama for two months -- which means, he told a visiting AFP journalist, he has about two more to go.

"The last time I checked, I was still married," he joked, as fish swim through bright blue Caribbean waters outside the portholes.

But Koch, a 59-year-old aerospace engineer from Germany, has grander plans than simply notching a record. His stunt, he says, could change the way we think about human life -- and where we can settle, even permanently.

"Moving out to the ocean is something we should do as a species," he told AFP.

"What we are........

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