Fermi's Paradox
The question originally posed by Enrico Fermi, which simply asks why intelligent life hasn't found us if it is probable to be found in the universe (and therefore common).
Articles on KurzweilAI.net that refer to Fermi's Paradox
Answering Fermi's Paradox By Hugo de GarisSingularity Chat with Vernor Vinge and Ray Kurzweil By Vernor Vinge and Ray Kurzweil
Related Links
Fermi&s ParadoxThe Fermi Paradox