Re: Have aliens visited earth?
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To everyone who hasn't seen Cosmos,
it's a brilliant mini series from Carl Sagan done 25 some odd years ago. I recommend seeing all 13 episodes, but there is one in particular, "Encyclopedia Galactica" I believe, that deals with this subject. Even today, it's extremely informative and a great watch. This episode even goes into the probability theories.
Check it out,
Ross
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Yes, I loved these shows when I was a kid.
The key variable in that probability, the assumption that makes all the difference, was "how long would a civilization last after it developed the capacity to destroy itself?"
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