Fermi Paradox/Drake Equation - Drake's equation attempts to estimate the number N of currently extant civilizations in our galaxy that would be able to contact each other.
Fermi's Paradox - Lecture notes from a college cosmology course.
Fermi's Paradox - Summary and a few probability calculations.
I.T. seeks E.T. - Discusses the Allen Telescope Array (ATA) scheduled to be completed by 2005 and the search for extraterrestrial life as it related to Fermi's Paradox and the Drake Equation.