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Dear Robert:

> To those of you on the list who are laying awake at night fretting about 
global warming, here is more > immediate threat to add to your worries.
> One can only hope that our scientists get this sorted out before the appointed hour...

They did.
My information is based on the lecture of Freeman Dyson at Purdue
University, perhaps 10
years ago. (For those who don't know, he is a great physicist,
mathematician, and one
of the top scientists who is interested in these problems). The
lecture was titled
"Detection and deflection of Earth colliding bodies".
Shortly speaking, scientists DO monitor these bodies. The bodies that
are on
the "possible collision course". They are able to detect any such body
many years in
advance. If a really dangerous one is detected this will be known, and
we DO have means
to deflect it. The main problem is how much in advance we know. Modern
technology
(and moderate expenses) permit to detect really dangerous bodies about
20 years in advance.
There are technologies with permit us to deal with this danger in 20
years period
(including research and development).
I can be more specific, but I afraid this is very far from the main
topic of the list.
(I can describe some details off the list, of course).

Anyway, my personal conclusion from this lecture was that "there is
nothing to worry about"
in comparison to the REAL dangers facing us. Roughly speaking, the
risk of a serious collision
(in terms of the number of victims and the chance that this happens)
is comparable to the risk
of a major earthquake). All this is negligible in comparison with the
real dangers we face:-(

Alex.

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