Posted: Aug 20, 2011 9:07 pm
Galaxian said "That's how I know that billions of those are intelligent."
Don't count on it. The odds of creating very intelligent, conscience life are one divided by all the variations of DNA that have ever existed (past and present).
The universe is 13+ billions of years old. As Fermi said, if it (intelligent life) is common and it has had billions of years to get around, where is it?