A Wild Hypothesis
Essay on the development of civilizations.
http://www.stampe.nu/wild/
Debate Topic: Fermi's Paradox
A couple of possible resolutions to the question of galactic colonization.
http://www.phys.unsw.edu.au/astro/seti/dt/fermi.html
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.
http://www.newton.dep.anl.gov/askasci/phy99/phy99024.htm
Fermi's Paradox
Lecture notes from a college cosmology course.
http://zebu.uoregon.edu/~js/cosmo/lectures/lec28.html
I.T. seeks E.T.
Discusses the Allen Telescope Array (ATA) scheduled to be completed by 2005 and the search for extraterrestial life as it related to Fermi's Paradox and the Drake Equation.
http://astronomy.swin.edu.au/staff/gmackie/Fermi_Drake.html
The Drake Equation
Describes the famous formula for estimating the number and character of alien civilizations within the galaxy. Includes an online form that calculates your numbers.
http://www.seti.org/seti/seti-science/
The Fermi Paradox
Introductory articles on the theory.
http://www.fermisparadox.com/