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Aquanaut Survives Underwater by Peeing on Algae

Watch this video about Australia's "aquanaut" on HowStuffWorks. on April 5, 29-year-old Lloyd Godson, a marine biologist, entered the 2 meter-high yellow biosub capsule. His survival hinged on a coil of green algae which provided air in return for Godson urinating on the plants each day. See how biosubs and submarines work in this news video from Reuters.
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