On Wed Sep 27 08:52:21 2000, george murphy <email@example.com> wrote:
Of the my estimates of the Drake Equation variables:
> The problem here...
George, I am not going to defend those values. You can chose your own
values/guesses or leave it alone. But those are my estimates regardless of the
problems. They were mere illustrations trying to tie a few issues together in
novel ways. I was trying to show implications of a shortlived civilization to
the SETI program. If a civilization is shortlived, then it is no wonder that we
don't hear ET. His radio signals form a hollow sphere 200 lightyears thick,
centered on the last position of his planet. If we are to hear ET under that
assumption, one must be listening in the correct direction during the 200 years
that the signals pass by your planet. After that 200 year period, there is
silence and we can't hear radio waves that have passed us by and are heading
off into the silence of the universe.
> BTW, The Akron Beacon Journal had a front page story yesterday with the
> "Oil is plentiful in the world, but it'll cost us to find it." The story is
> that there is at least a 40 year supply, even with rising demand. Whether or
> facts & estimates are correct (& some problems & doubts are pointed out),
> people will see is just "Oil is plentiful in the world" & their acceptance of
> the Rush Limbaugh mantra, "Folks, you don't have to change your lifestyle"
> be reinforced.
Oil is plentiful. In fact there is about 4 times more oil in the ground than we
have or ever will produce. The laws of thermodynamics and fluid flow resist
our every attempt to drain the last of the oil in a reservoir and bring it to
the surface. Most fields are abandoned after only 20-50% of the original oil
in place has been produced. Prudhoe Bay had 20 billion barrels in it when it
was found. They will barely produce 12 billiion. That means we will leave 8
billion barrels behind. Why are we leaving all that oil behind? Because it
simply won't flow. There is a point at which the forces that bind the oil to
the rock particles are stronger than our ability to pull it to the surface.
Little short of a change in the laws of physics will alter that situation.
Even when we make a materials science breakthrough and come up with some goop
we can inject into the rocks to losen the oil, it generally only gives us an
additional .5% -1% of the original oil in place. And we are then so pleased
with ourselves having made millions for our companies. So, yes, oil is
plentiful, but you can't get to it.
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