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From: Henry Spencer <>
Subject: Re: Human-powered propulsion?
Date: Sun, 5 Apr 1998 19:57:23 GMT

In article <6g3h00$jum$>,
Christopher Michael Jones <> wrote:
>: >Finding a suitable fluid for "breathing" is a much more difficult problem.
>: It exists, it is real.
>Yep, liquid perfluorocarbons can dissolve a large enough quantity of O2
>to be sufficient for breathing...

Even water will do that, if pressurized somewhat -- the earliest studies
used water.  What's harder is finding something that will also dissolve
enough CO2; the early experimental animals died of CO2 poisoning.  Both
have to be soluble enough to be carried in and out adequately without
excessive breathing effort (breathing a liquid is much harder work than
breathing a gas, and exhaustion was a contributing factor in the animals'
Being the last man on the Moon                  |     Henry Spencer
is a very dubious honor. -- Gene Cernan         |

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