The Gravity Option

--- In spacesettlers@yahoogroups.com, "sailor.barsoom"
wrote:
>
> Actually, it seems that a super sanitized environment weakens the
> immune system. I sometimes wonder how much of the immune system
> problems astronauts suffer are due to weightlessness, and how much are
> due to the already highly sanitized environment of a space shuttle or
> space station.
>
Right. Every technology extends a capacity of the body, while
simultaneously causing that capacity of the body to atrophy. The
challenge for space colony architects will be to create environments
so sanitized that immune systems are no longer necessary.