Re: Where are they?

Robin Hanson (hanson@econ.Berkeley.EDU)
Wed, 26 Nov 1997 10:46:14 -0800

carl feynman <> wrote:
>>I've wondered about the intergalatic bubbles: if you had a soup of
>>galaxies, and randomly seeded it with rare expanding intelligence, would
>>you get the bubbles we observe, with visible galaxies in the areas between
>if civilizations for some reason like to leave 'neutral zones' between ...
>If the civilizations that built the bubbles wanted to conserve energy for
>the longest possible time,
>... requires that all expansion was complete a long time ago.

If we look far enough out, we should see when the voids formed, and this
theory would seem to predict that each void would expand rapidly from a
central point. We aren't too far from testing this prediction I think.

Radical energy conservation seems a bizzare tendency to observe in *all* voids
across the universe. They obviously aren't hiding from each other, after
all. It would seem to imply they can't create new universes to explore, and
so realize that their local energy is all they'll ever have.

Having neutral zones full of visibly noisy galaxies also seems odd.
In neutral zones on earth, one tries to minimize activity so that it is easist
to tell if someone is trying to cross.

Robin Hanson
RWJF Health Policy Scholar, Sch. of Public Health 510-643-1884
140 Warren Hall, UC Berkeley, CA 94720-7360 FAX: 510-643-8614