[...]
 > A few speculations:
 > 1)   Intelligent life in the cosmos is a lot more common that we
 > tend to think, so within the handful of stars within, say, 20
 > light years of us, there's at least one spacefaring civilization.
 > 2)   Intelligent life in the cosmos is much more stable and/or
 > long-lived than we are.
 > 3)   We've got some fundamental and profound misconceptions about
 > communications and/or space travel.
Have you read the "Foundation" trilogy?
js
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