Anthony Cerrato  wrote:

> > Nontheless, our survival isn't guaranteed.  There are a
> number of
> > failure scenarios - from large meteor impacts to alien
> invasions.
> >
> > However, it seems that these can be assigned relatively
> low
> > probabilities - at least in the short term.
> 
> And longer too, once we get manage to get that honking-big
> asteroid splitting gun working.  :)           ...tonyC

That's right. Instead of a massive amount of kinetic energy in one
place, we want to disturb the ecosystems of the entire planet by
spreading it around in slightly less damaging parcels.
-- 
John Wilkins wilkins.id.au
For long you live and high you fly, 
and smiles you'll give and tears you'll cry
and all you touch and all you see is all your life will ever be
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