Thanks for sharing that with us Gerry
are wrong about the chemistry: it actually requires very fine tuning.
> > Life is rare.
> >2: Life is common, but unique civilisations are not. Thus 'do not
> > interfere' is the key rule. We are presently in a cosmic game park
(or
> > visited by machinery built of the dark matter that makes up 30-50%
of
> > the universal mass, but which we cannot yet detect. Or whatever.
> >3: It is dangerous out there. Keep silent or you attract attention.
> > As a subset, societies of a certain density and technical complexity
> > always destroy themselves.
> >4: Aware biological life has a very short time span of technical
> > civilisation before it finds a 'better way to be'. A few hundred
> > years, perhaps? Thus brief flickers of radio emissions, thus the
> > failure of SETI.
> >
>> You left out:
> 5: Interstellar exploration is difficult and expensive, and ships will
> take centuries to cross distances of a few light years. So nobody wants
> to go.
>> As for radio signals - maybe everyone gives up after 10000 years or so.
> You seem concerned after only 50. Some detectable ET you'd turn out to
> be! Just because they don't transmit doesn't mean they aren't there.
>> - Gerry Quinn
