I read about a theory once that truly amazed me. I dont remember the name of it but it was thaught provoking to say the least....OK here goes.
The odds of inteligent life from different worlds ever meeting is remote at best given our current knowlege of physics.
If you do the math and figure the possibilitys of a civilization ever growing and evolving enough to develop space travle technology it eliminates most of them.
Think about our ability to destroy our planet and how many times over it can be done.....now think how close we as a world have come to total world destruction.
Now consider how big just our galexy is just to travel under current conditions and consider how old the universe is our existance as humans is miniscule at best.
Given all the chalenges facing a modern civilization and our current knowledge of space travel and the size of the univers the chances of two civilizations developing enough to meet at the same place at the same TIME is remote at best.
It was alot better written that my paraphrase but has anyone else heard this?