Interesting

[Rumpy Pumpy]

Lloyd Godson, 27, an Australian aquanaut and marine biologist, was able to survive 13 days in an underwater "biosub", breathing oxygen delivered by algae fueled with his own urine and pedaling a bike for electricity, going out unscathed.

http://news.softpedia.com/news/How-to-L ... 2359.shtml (http://news.softpedia.com/news/How-to-Live-13-Days-Underwater-Using-Just-Your-Urine-52359.shtml)

[new2scrub]

Yes I saw this also but I think the last few days they had to supplement the o2 ,Think they said that they would need much more algae and much bigger power source for light and pumping. But algae IS amazing!