The Fool said: > So where are they?
They don't exist. The evolution of a species capable of cultural transmission of tool use is so unlikely that on average of order one evolves in the currently observable universe in the time since the Big Bang. At least that's my theory. For how this might be a wonderful universe, see my http://cdr.sine.com/cdr/article.cfm?id=35 Also, Barrow and Tipler's _The Anthropic Cosmological Principle_ is worth looking at for arguments about technological civilisations being very rare. Rich GSV Lonely
