From: Robin Hanson (hanson@hss.caltech.edu)
Date: Mon Mar 10 1997 - 15:52:40 MST
I wrote:
>If multi-celluar life on a planet gets destroyed every 100my, then
>this should happen on average 100 times over 10by. So the chance it
>never happened at any one place is exp(-100) ~= 10^-43 (assuming a
>poisson distribution). So how big is a sphere enclosing 10^43 stars?
Oops again. We're only looking at about 1 billion years of
multicelluar life on Earth, so thats only a filter of size
exp(-10) = 4.5x10^-5.
Robin D. Hanson hanson@hss.caltech.edu http://hss.caltech.edu/~hanson/
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